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Rename CronetEngineFactory to CronetEngineWrapper
In addition, the class now accepts available Cronet instances and returns the source of the current CronetEngine. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=156185701
This commit is contained in:
tonihei
Oliver Woodman
parent
1594e71917
commit
4359d44331
3 changed files with 260 additions and 193 deletions
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@ -43,7 +43,7 @@ public final class CronetDataSourceFactory extends BaseFactory {
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public static final int DEFAULT_READ_TIMEOUT_MILLIS =
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CronetDataSource.DEFAULT_READ_TIMEOUT_MILLIS;
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private final CronetEngineFactory cronetEngineFactory;
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private final CronetEngineWrapper cronetEngineWrapper;
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private final Executor executor;
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private final Predicate<String> contentTypePredicate;
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private final TransferListener<? super DataSource> transferListener;
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@ -55,14 +55,14 @@ public final class CronetDataSourceFactory extends BaseFactory {
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/**
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* Constructs a CronetDataSourceFactory.
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* <p>
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* If the {@link CronetEngineFactory} fails to provide a suitable {@link CronetEngine}, the
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* provided fallback {@link HttpDataSource.Factory} will be used instead.
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* If the {@link CronetEngineWrapper} fails to provide a {@link CronetEngine}, the provided
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* fallback {@link HttpDataSource.Factory} will be used instead.
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*
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* Sets {@link CronetDataSource#DEFAULT_CONNECT_TIMEOUT_MILLIS} as the connection timeout, {@link
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* CronetDataSource#DEFAULT_READ_TIMEOUT_MILLIS} as the read timeout and disables
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* cross-protocol redirects.
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*
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* @param cronetEngineFactory A {@link CronetEngineFactory}.
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* @param cronetEngineWrapper A {@link CronetEngineWrapper}.
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* @param executor The {@link java.util.concurrent.Executor} that will perform the requests.
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* @param contentTypePredicate An optional {@link Predicate}. If a content type is rejected by the
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* predicate then an {@link InvalidContentTypeException} is thrown from
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@ -71,25 +71,25 @@ public final class CronetDataSourceFactory extends BaseFactory {
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* @param fallbackFactory A {@link HttpDataSource.Factory} which is used as a fallback in case
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* no suitable CronetEngine can be build.
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*/
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public CronetDataSourceFactory(CronetEngineFactory cronetEngineFactory,
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public CronetDataSourceFactory(CronetEngineWrapper cronetEngineWrapper,
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Executor executor, Predicate<String> contentTypePredicate,
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TransferListener<? super DataSource> transferListener,
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HttpDataSource.Factory fallbackFactory) {
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this(cronetEngineFactory, executor, contentTypePredicate, transferListener,
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this(cronetEngineWrapper, executor, contentTypePredicate, transferListener,
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DEFAULT_CONNECT_TIMEOUT_MILLIS, DEFAULT_READ_TIMEOUT_MILLIS, false, fallbackFactory);
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}
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/**
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* Constructs a CronetDataSourceFactory.
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* <p>
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* If the {@link CronetEngineFactory} fails to provide a suitable {@link CronetEngine}, a
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* If the {@link CronetEngineWrapper} fails to provide a {@link CronetEngine}, a
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* {@link DefaultHttpDataSourceFactory} will be used instead.
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*
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* Sets {@link CronetDataSource#DEFAULT_CONNECT_TIMEOUT_MILLIS} as the connection timeout, {@link
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* CronetDataSource#DEFAULT_READ_TIMEOUT_MILLIS} as the read timeout and disables
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* cross-protocol redirects.
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*
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* @param cronetEngineFactory A {@link CronetEngineFactory}.
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* @param cronetEngineWrapper A {@link CronetEngineWrapper}.
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* @param executor The {@link java.util.concurrent.Executor} that will perform the requests.
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* @param contentTypePredicate An optional {@link Predicate}. If a content type is rejected by the
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* predicate then an {@link InvalidContentTypeException} is thrown from
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@ -97,10 +97,10 @@ public final class CronetDataSourceFactory extends BaseFactory {
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* @param transferListener An optional listener.
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* @param userAgent A user agent used to create a fallback HttpDataSource if needed.
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*/
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public CronetDataSourceFactory(CronetEngineFactory cronetEngineFactory,
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public CronetDataSourceFactory(CronetEngineWrapper cronetEngineWrapper,
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Executor executor, Predicate<String> contentTypePredicate,
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TransferListener<? super DataSource> transferListener, String userAgent) {
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this(cronetEngineFactory, executor, contentTypePredicate, transferListener,
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this(cronetEngineWrapper, executor, contentTypePredicate, transferListener,
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DEFAULT_CONNECT_TIMEOUT_MILLIS, DEFAULT_READ_TIMEOUT_MILLIS, false,
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new DefaultHttpDataSourceFactory(userAgent, transferListener,
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DEFAULT_CONNECT_TIMEOUT_MILLIS, DEFAULT_READ_TIMEOUT_MILLIS, false));
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@ -109,10 +109,10 @@ public final class CronetDataSourceFactory extends BaseFactory {
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/**
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* Constructs a CronetDataSourceFactory.
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* <p>
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* If the {@link CronetEngineFactory} fails to provide a suitable {@link CronetEngine}, a
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* If the {@link CronetEngineWrapper} fails to provide a {@link CronetEngine}, a
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* {@link DefaultHttpDataSourceFactory} will be used instead.
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*
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* @param cronetEngineFactory A {@link CronetEngineFactory}.
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* @param cronetEngineWrapper A {@link CronetEngineWrapper}.
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* @param executor The {@link java.util.concurrent.Executor} that will perform the requests.
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* @param contentTypePredicate An optional {@link Predicate}. If a content type is rejected by the
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* predicate then an {@link InvalidContentTypeException} is thrown from
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@ -123,11 +123,11 @@ public final class CronetDataSourceFactory extends BaseFactory {
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* @param resetTimeoutOnRedirects Whether the connect timeout is reset when a redirect occurs.
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* @param userAgent A user agent used to create a fallback HttpDataSource if needed.
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*/
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public CronetDataSourceFactory(CronetEngineFactory cronetEngineFactory,
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public CronetDataSourceFactory(CronetEngineWrapper cronetEngineWrapper,
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Executor executor, Predicate<String> contentTypePredicate,
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TransferListener<? super DataSource> transferListener, int connectTimeoutMs,
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int readTimeoutMs, boolean resetTimeoutOnRedirects, String userAgent) {
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this(cronetEngineFactory, executor, contentTypePredicate, transferListener,
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this(cronetEngineWrapper, executor, contentTypePredicate, transferListener,
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DEFAULT_CONNECT_TIMEOUT_MILLIS, DEFAULT_READ_TIMEOUT_MILLIS, resetTimeoutOnRedirects,
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new DefaultHttpDataSourceFactory(userAgent, transferListener, connectTimeoutMs,
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readTimeoutMs, resetTimeoutOnRedirects));
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@ -136,10 +136,10 @@ public final class CronetDataSourceFactory extends BaseFactory {
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/**
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* Constructs a CronetDataSourceFactory.
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* <p>
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* If the {@link CronetEngineFactory} fails to provide a suitable {@link CronetEngine}, the
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* provided fallback {@link HttpDataSource.Factory} will be used instead.
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* If the {@link CronetEngineWrapper} fails to provide a {@link CronetEngine}, the provided
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* fallback {@link HttpDataSource.Factory} will be used instead.
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*
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* @param cronetEngineFactory A {@link CronetEngineFactory}.
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* @param cronetEngineWrapper A {@link CronetEngineWrapper}.
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* @param executor The {@link java.util.concurrent.Executor} that will perform the requests.
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* @param contentTypePredicate An optional {@link Predicate}. If a content type is rejected by the
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* predicate then an {@link InvalidContentTypeException} is thrown from
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@ -151,12 +151,12 @@ public final class CronetDataSourceFactory extends BaseFactory {
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* @param fallbackFactory A {@link HttpDataSource.Factory} which is used as a fallback in case
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* no suitable CronetEngine can be build.
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*/
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public CronetDataSourceFactory(CronetEngineFactory cronetEngineFactory,
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public CronetDataSourceFactory(CronetEngineWrapper cronetEngineWrapper,
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Executor executor, Predicate<String> contentTypePredicate,
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TransferListener<? super DataSource> transferListener, int connectTimeoutMs,
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int readTimeoutMs, boolean resetTimeoutOnRedirects,
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HttpDataSource.Factory fallbackFactory) {
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this.cronetEngineFactory = cronetEngineFactory;
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this.cronetEngineWrapper = cronetEngineWrapper;
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this.executor = executor;
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this.contentTypePredicate = contentTypePredicate;
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this.transferListener = transferListener;
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@ -169,13 +169,12 @@ public final class CronetDataSourceFactory extends BaseFactory {
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@Override
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protected HttpDataSource createDataSourceInternal(HttpDataSource.RequestProperties
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defaultRequestProperties) {
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CronetEngine cronetEngine = cronetEngineFactory.createCronetEngine();
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CronetEngine cronetEngine = cronetEngineWrapper.getCronetEngine();
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if (cronetEngine == null) {
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return fallbackFactory.createDataSource();
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}
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return new CronetDataSource(cronetEngineFactory.createCronetEngine(), executor,
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contentTypePredicate, transferListener, connectTimeoutMs, readTimeoutMs,
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resetTimeoutOnRedirects, defaultRequestProperties);
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return new CronetDataSource(cronetEngine, executor, contentTypePredicate, transferListener,
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connectTimeoutMs, readTimeoutMs, resetTimeoutOnRedirects, defaultRequestProperties);
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}
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}
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@ -1,170 +0,0 @@
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.android.exoplayer2.ext.cronet;
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import android.content.Context;
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import android.util.Log;
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import java.lang.reflect.Field;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import org.chromium.net.CronetEngine;
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import org.chromium.net.CronetProvider;
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/**
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* A factory class which creates or reuses a {@link CronetEngine}.
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*/
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public final class CronetEngineFactory {
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private static final String TAG = "CronetEngineFactory";
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private final Context context;
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private final boolean preferGMSCoreCronet;
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private CronetEngine cronetEngine = null;
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/**
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* Creates the factory for a {@link CronetEngine}. Sets factory to prefer natively bundled Cronet
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* over GMSCore Cronet if both are available.
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*
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* @param context A context.
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*/
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public CronetEngineFactory(Context context) {
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this(context, false);
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}
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/**
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* Creates the factory for a {@link CronetEngine} and specifies whether Cronet from GMSCore should
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* be preferred over natively bundled Cronet if both are available.
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*
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* @param context A context.
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*/
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public CronetEngineFactory(Context context, boolean preferGMSCoreCronet) {
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this.context = context.getApplicationContext();
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this.preferGMSCoreCronet = preferGMSCoreCronet;
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}
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/**
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* Create or reuse a {@link CronetEngine}. If no CronetEngine is available, the method returns
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* null.
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*
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* @return The CronetEngine, or null if no CronetEngine is available.
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*/
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/* package */ CronetEngine createCronetEngine() {
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if (cronetEngine == null) {
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List<CronetProvider> cronetProviders = CronetProvider.getAllProviders(context);
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// Remove disabled and fallback Cronet providers from list
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for (int i = cronetProviders.size() - 1; i >= 0; i--) {
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if (!cronetProviders.get(i).isEnabled()
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|| CronetProvider.PROVIDER_NAME_FALLBACK.equals(cronetProviders.get(i).getName())) {
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cronetProviders.remove(i);
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}
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}
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// Sort remaining providers by type and version.
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Collections.sort(cronetProviders, new CronetProviderComparator(preferGMSCoreCronet));
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for (int i = 0; i < cronetProviders.size(); i++) {
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String providerName = cronetProviders.get(i).getName();
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try {
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cronetEngine = cronetProviders.get(i).createBuilder().build();
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Log.d(TAG, "CronetEngine built using " + providerName);
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} catch (UnsatisfiedLinkError e) {
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Log.w(TAG, "Failed to link Cronet binaries. Please check if native Cronet binaries are "
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+ "bundled into your app.");
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}
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}
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}
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if (cronetEngine == null) {
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Log.w(TAG, "Cronet not available. Using fallback provider.");
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}
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return cronetEngine;
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}
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private static class CronetProviderComparator implements Comparator<CronetProvider> {
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private final String gmsCoreCronetName;
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private final boolean preferGMSCoreCronet;
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public CronetProviderComparator(boolean preferGMSCoreCronet) {
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// GMSCore CronetProvider classes are only available in some configurations.
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// Thus, we use reflection to copy static name.
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String gmsCoreVersionString = null;
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try {
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Class<?> cronetProviderInstallerClass =
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Class.forName("com.google.android.gms.net.CronetProviderInstaller");
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Field providerNameField = cronetProviderInstallerClass.getDeclaredField("PROVIDER_NAME");
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gmsCoreVersionString = (String) providerNameField.get(null);
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} catch (ClassNotFoundException e) {
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// GMSCore CronetProvider not available.
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} catch (NoSuchFieldException e) {
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// GMSCore CronetProvider not available.
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} catch (IllegalAccessException e) {
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// GMSCore CronetProvider not available.
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}
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gmsCoreCronetName = gmsCoreVersionString;
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this.preferGMSCoreCronet = preferGMSCoreCronet;
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}
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@Override
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public int compare(CronetProvider providerLeft, CronetProvider providerRight) {
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int typePreferenceLeft = evaluateCronetProviderType(providerLeft.getName());
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int typePreferenceRight = evaluateCronetProviderType(providerRight.getName());
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if (typePreferenceLeft != typePreferenceRight) {
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return typePreferenceLeft - typePreferenceRight;
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}
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return -compareVersionStrings(providerLeft.getVersion(), providerRight.getVersion());
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}
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/**
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* Convert Cronet provider name into a sortable preference value.
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* Smaller values are preferred.
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*/
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private int evaluateCronetProviderType(String providerName) {
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if (CronetProvider.PROVIDER_NAME_APP_PACKAGED.equals(providerName)) {
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return 1;
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}
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if (gmsCoreCronetName != null && gmsCoreCronetName.equals(providerName)) {
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return preferGMSCoreCronet ? 0 : 2;
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}
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// Unknown provider type.
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return -1;
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}
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/**
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* Compares version strings of format "12.123.35.23".
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*/
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private static int compareVersionStrings(String versionLeft, String versionRight) {
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if (versionLeft == null || versionRight == null) {
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return 0;
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}
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String[] versionStringsLeft = versionLeft.split("\\.");
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String[] versionStringsRight = versionRight.split("\\.");
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int minLength = Math.min(versionStringsLeft.length, versionStringsRight.length);
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for (int i = 0; i < minLength; i++) {
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if (!versionStringsLeft[i].equals(versionStringsRight[i])) {
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try {
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int versionIntLeft = Integer.parseInt(versionStringsLeft[i]);
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int versionIntRight = Integer.parseInt(versionStringsRight[i]);
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return versionIntLeft - versionIntRight;
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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}
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return 0;
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}
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}
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}
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@ -0,0 +1,238 @@
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.android.exoplayer2.ext.cronet;
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import android.content.Context;
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import android.support.annotation.IntDef;
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import android.util.Log;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.reflect.Field;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import org.chromium.net.CronetEngine;
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import org.chromium.net.CronetProvider;
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/**
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* A wrapper class for a {@link CronetEngine}.
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*/
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public final class CronetEngineWrapper {
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private static final String TAG = "CronetEngineWrapper";
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private final CronetEngine cronetEngine;
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private final @CronetEngineSource int cronetEngineSource;
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/**
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* Source of {@link CronetEngine}.
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*/
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@Retention(RetentionPolicy.SOURCE)
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@IntDef({SOURCE_NATIVE, SOURCE_GMS, SOURCE_UNKNOWN, SOURCE_USER_PROVIDED, SOURCE_UNAVAILABLE})
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public @interface CronetEngineSource {}
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/**
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* Natively bundled Cronet implementation.
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*/
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public static final int SOURCE_NATIVE = 0;
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/**
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* Cronet implementation from GMSCore.
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*/
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public static final int SOURCE_GMS = 1;
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/**
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* Other (unknown) Cronet implementation.
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*/
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public static final int SOURCE_UNKNOWN = 2;
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/**
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* User-provided Cronet engine.
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*/
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public static final int SOURCE_USER_PROVIDED = 3;
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/**
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* No Cronet implementation available. Fallback Http provider is used if possible.
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*/
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public static final int SOURCE_UNAVAILABLE = 4;
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/**
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* Creates a wrapper for a {@link CronetEngine} which automatically selects the most suitable
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* {@link CronetProvider}. Sets wrapper to prefer natively bundled Cronet over GMSCore Cronet
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* if both are available.
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*
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* @param context A context.
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*/
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public CronetEngineWrapper(Context context) {
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this(context, false);
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}
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/**
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* Creates a wrapper for a {@link CronetEngine} which automatically selects the most suitable
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* {@link CronetProvider} based on user preference.
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*
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* @param context A context.
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* @param preferGMSCoreCronet Whether Cronet from GMSCore should be preferred over natively
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* bundled Cronet if both are available.
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*/
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public CronetEngineWrapper(Context context, boolean preferGMSCoreCronet) {
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CronetEngine cronetEngine = null;
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@CronetEngineSource int cronetEngineSource = SOURCE_UNAVAILABLE;
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List<CronetProvider> cronetProviders = CronetProvider.getAllProviders(context);
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// Remove disabled and fallback Cronet providers from list
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for (int i = cronetProviders.size() - 1; i >= 0; i--) {
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if (!cronetProviders.get(i).isEnabled()
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|| CronetProvider.PROVIDER_NAME_FALLBACK.equals(cronetProviders.get(i).getName())) {
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cronetProviders.remove(i);
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}
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}
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// Sort remaining providers by type and version.
|
||||
CronetProviderComparator providerComparator = new CronetProviderComparator(preferGMSCoreCronet);
|
||||
Collections.sort(cronetProviders, providerComparator);
|
||||
for (int i = 0; i < cronetProviders.size() && cronetEngine == null; i++) {
|
||||
String providerName = cronetProviders.get(i).getName();
|
||||
try {
|
||||
cronetEngine = cronetProviders.get(i).createBuilder().build();
|
||||
if (providerComparator.isNativeProvider(providerName)) {
|
||||
cronetEngineSource = SOURCE_NATIVE;
|
||||
} else if (providerComparator.isGMSCoreProvider(providerName)) {
|
||||
cronetEngineSource = SOURCE_GMS;
|
||||
} else {
|
||||
cronetEngineSource = SOURCE_UNKNOWN;
|
||||
}
|
||||
Log.d(TAG, "CronetEngine built using " + providerName);
|
||||
} catch (SecurityException e) {
|
||||
Log.w(TAG, "Failed to build CronetEngine. Please check if current process has "
|
||||
+ "android.permission.ACCESS_NETWORK_STATE.");
|
||||
} catch (UnsatisfiedLinkError e) {
|
||||
Log.w(TAG, "Failed to link Cronet binaries. Please check if native Cronet binaries are "
|
||||
+ "bundled into your app.");
|
||||
}
|
||||
}
|
||||
if (cronetEngine == null) {
|
||||
Log.w(TAG, "Cronet not available. Using fallback provider.");
|
||||
}
|
||||
this.cronetEngine = cronetEngine;
|
||||
this.cronetEngineSource = cronetEngineSource;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a wrapper for an existing CronetEngine.
|
||||
*
|
||||
* @param cronetEngine An existing CronetEngine.
|
||||
*/
|
||||
public CronetEngineWrapper(CronetEngine cronetEngine) {
|
||||
this.cronetEngine = cronetEngine;
|
||||
this.cronetEngineSource = SOURCE_USER_PROVIDED;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the source of the wrapped {@link CronetEngine}.
|
||||
*
|
||||
* @return A {@link CronetEngineSource} value.
|
||||
*/
|
||||
public @CronetEngineSource int getCronetEngineSource() {
|
||||
return cronetEngineSource;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the wrapped {@link CronetEngine}.
|
||||
*
|
||||
* @return The CronetEngine, or null if no CronetEngine is available.
|
||||
*/
|
||||
/* package */ CronetEngine getCronetEngine() {
|
||||
return cronetEngine;
|
||||
}
|
||||
|
||||
private static class CronetProviderComparator implements Comparator<CronetProvider> {
|
||||
|
||||
private final String gmsCoreCronetName;
|
||||
private final boolean preferGMSCoreCronet;
|
||||
|
||||
public CronetProviderComparator(boolean preferGMSCoreCronet) {
|
||||
// GMSCore CronetProvider classes are only available in some configurations.
|
||||
// Thus, we use reflection to copy static name.
|
||||
String gmsCoreVersionString = null;
|
||||
try {
|
||||
Class<?> cronetProviderInstallerClass =
|
||||
Class.forName("com.google.android.gms.net.CronetProviderInstaller");
|
||||
Field providerNameField = cronetProviderInstallerClass.getDeclaredField("PROVIDER_NAME");
|
||||
gmsCoreVersionString = (String) providerNameField.get(null);
|
||||
} catch (ClassNotFoundException e) {
|
||||
// GMSCore CronetProvider not available.
|
||||
} catch (NoSuchFieldException e) {
|
||||
// GMSCore CronetProvider not available.
|
||||
} catch (IllegalAccessException e) {
|
||||
// GMSCore CronetProvider not available.
|
||||
}
|
||||
gmsCoreCronetName = gmsCoreVersionString;
|
||||
this.preferGMSCoreCronet = preferGMSCoreCronet;
|
||||
}
|
||||
|
||||
@Override
|
||||
public int compare(CronetProvider providerLeft, CronetProvider providerRight) {
|
||||
int typePreferenceLeft = evaluateCronetProviderType(providerLeft.getName());
|
||||
int typePreferenceRight = evaluateCronetProviderType(providerRight.getName());
|
||||
if (typePreferenceLeft != typePreferenceRight) {
|
||||
return typePreferenceLeft - typePreferenceRight;
|
||||
}
|
||||
return -compareVersionStrings(providerLeft.getVersion(), providerRight.getVersion());
|
||||
}
|
||||
|
||||
public boolean isNativeProvider(String providerName) {
|
||||
return CronetProvider.PROVIDER_NAME_APP_PACKAGED.equals(providerName);
|
||||
}
|
||||
|
||||
public boolean isGMSCoreProvider(String providerName) {
|
||||
return gmsCoreCronetName != null && gmsCoreCronetName.equals(providerName);
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert Cronet provider name into a sortable preference value.
|
||||
* Smaller values are preferred.
|
||||
*/
|
||||
private int evaluateCronetProviderType(String providerName) {
|
||||
if (isNativeProvider(providerName)) {
|
||||
return 1;
|
||||
}
|
||||
if (isGMSCoreProvider(providerName)) {
|
||||
return preferGMSCoreCronet ? 0 : 2;
|
||||
}
|
||||
// Unknown provider type.
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Compares version strings of format "12.123.35.23".
|
||||
*/
|
||||
private static int compareVersionStrings(String versionLeft, String versionRight) {
|
||||
if (versionLeft == null || versionRight == null) {
|
||||
return 0;
|
||||
}
|
||||
String[] versionStringsLeft = versionLeft.split("\\.");
|
||||
String[] versionStringsRight = versionRight.split("\\.");
|
||||
int minLength = Math.min(versionStringsLeft.length, versionStringsRight.length);
|
||||
for (int i = 0; i < minLength; i++) {
|
||||
if (!versionStringsLeft[i].equals(versionStringsRight[i])) {
|
||||
try {
|
||||
int versionIntLeft = Integer.parseInt(versionStringsLeft[i]);
|
||||
int versionIntRight = Integer.parseInt(versionStringsRight[i]);
|
||||
return versionIntLeft - versionIntRight;
|
||||
} catch (NumberFormatException e) {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in a new issue