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Update CacheDataSink to optionally use a BufferedOutputStream for writing

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-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139381958
This commit is contained in:
yutingtseng 2016-11-16 14:49:20 -08:00 committed by Oliver Woodman
parent 92d34cd877
commit 2add12d5f7
1 changed files with 23 additions and 3 deletions
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26
library/src/main/java/com/google/android/exoplayer2/upstream/cache/CacheDataSink.java vendored
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@ -21,9 +21,11 @@ import com.google.android.exoplayer2.upstream.DataSpec;
import com.google.android.exoplayer2.upstream.cache.Cache.CacheException;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.Util;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* Writes data into a cache.
@ -32,10 +34,12 @@ public final class CacheDataSink implements DataSink {
private final Cache cache;
private final long maxCacheFileSize;
private final int bufferSize;
private DataSpec dataSpec;
private File file;
private FileOutputStream outputStream;
private OutputStream outputStream;
private FileOutputStream underlyingFileOutputStream;
private long outputStreamBytesWritten;
private long dataSpecBytesWritten;
@ -57,8 +61,21 @@ public final class CacheDataSink implements DataSink {
* multiple cache files.
*/
public CacheDataSink(Cache cache, long maxCacheFileSize) {
this(cache, maxCacheFileSize, 0);
}
/**
* @param cache The cache into which data should be written.
* @param maxCacheFileSize The maximum size of a cache file, in bytes. If the sink is opened for
* a {@link DataSpec} whose size exceeds this value, then the data will be fragmented into
* multiple cache files.
* @param bufferSize The buffer size in bytes for writing to a cache file. A zero or negative
* value disables buffering.
*/
public CacheDataSink(Cache cache, long maxCacheFileSize, int bufferSize) {
this.cache = Assertions.checkNotNull(cache);
this.maxCacheFileSize = maxCacheFileSize;
this.bufferSize = bufferSize;
}
@Override
@ -114,7 +131,10 @@ public final class CacheDataSink implements DataSink {
private void openNextOutputStream() throws IOException {
file = cache.startFile(dataSpec.key, dataSpec.absoluteStreamPosition + dataSpecBytesWritten,
Math.min(dataSpec.length - dataSpecBytesWritten, maxCacheFileSize));
outputStream = new FileOutputStream(file);
underlyingFileOutputStream = new FileOutputStream(file);
outputStream = bufferSize > 0
? new BufferedOutputStream(underlyingFileOutputStream, bufferSize)
: underlyingFileOutputStream;
outputStreamBytesWritten = 0;
}
@ -126,7 +146,7 @@ public final class CacheDataSink implements DataSink {
boolean success = false;
try {
outputStream.flush();
outputStream.getFD().sync();
underlyingFileOutputStream.getFD().sync();
success = true;
} finally {
Util.closeQuietly(outputStream);