/**
* Generate testing environment and return a collection of blocks on which to run the tests.
*
* @param bpid Block pool ID to generate blocks for
* @param dataSet Namespace in which to insert blocks
* @return Contrived blocks for further testing.
* @throws IOException
*/
private ExtendedBlock[] setup(String bpid, FsDatasetImpl dataSet) throws IOException {
// setup replicas map
ExtendedBlock[] blocks =
new ExtendedBlock[] {
new ExtendedBlock(bpid, 1, 1, 2001), new ExtendedBlock(bpid, 2, 1, 2002),
new ExtendedBlock(bpid, 3, 1, 2003), new ExtendedBlock(bpid, 4, 1, 2004),
new ExtendedBlock(bpid, 5, 1, 2005), new ExtendedBlock(bpid, 6, 1, 2006)
};
ReplicaMap replicasMap = dataSet.volumeMap;
FsVolumeImpl vol =
(FsVolumeImpl) dataSet.volumes.getNextVolume(StorageType.DEFAULT, 0).getVolume();
ReplicaInfo replicaInfo =
new FinalizedReplica(
blocks[FINALIZED].getLocalBlock(), vol, vol.getCurrentDir().getParentFile());
replicasMap.add(bpid, replicaInfo);
replicaInfo.getBlockFile().createNewFile();
replicaInfo.getMetaFile().createNewFile();
replicasMap.add(
bpid,
new ReplicaInPipeline(
blocks[TEMPORARY].getBlockId(),
blocks[TEMPORARY].getGenerationStamp(),
vol,
vol.createTmpFile(bpid, blocks[TEMPORARY].getLocalBlock()).getParentFile(),
0));
replicaInfo =
new ReplicaBeingWritten(
blocks[RBW].getLocalBlock(),
vol,
vol.createRbwFile(bpid, blocks[RBW].getLocalBlock()).getParentFile(),
null);
replicasMap.add(bpid, replicaInfo);
replicaInfo.getBlockFile().createNewFile();
replicaInfo.getMetaFile().createNewFile();
replicasMap.add(
bpid,
new ReplicaWaitingToBeRecovered(
blocks[RWR].getLocalBlock(),
vol,
vol.createRbwFile(bpid, blocks[RWR].getLocalBlock()).getParentFile()));
replicasMap.add(
bpid,
new ReplicaUnderRecovery(
new FinalizedReplica(
blocks[RUR].getLocalBlock(), vol, vol.getCurrentDir().getParentFile()),
2007));
return blocks;
}
/** Asynchronously lazy persist the block from the RamDisk to Disk. */
void submitLazyPersistTask(
String bpId,
long blockId,
long genStamp,
long creationTime,
File metaFile,
File blockFile,
FsVolumeReference target)
throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug(
"LazyWriter schedule async task to persist RamDisk block pool id: "
+ bpId
+ " block id: "
+ blockId);
}
FsVolumeImpl volume = (FsVolumeImpl) target.getVolume();
File lazyPersistDir = volume.getLazyPersistDir(bpId);
if (!lazyPersistDir.exists() && !lazyPersistDir.mkdirs()) {
FsDatasetImpl.LOG.warn("LazyWriter failed to create " + lazyPersistDir);
throw new IOException(
"LazyWriter fail to find or create lazy persist dir: " + lazyPersistDir.toString());
}
ReplicaLazyPersistTask lazyPersistTask =
new ReplicaLazyPersistTask(
bpId, blockId, genStamp, creationTime, blockFile, metaFile, target, lazyPersistDir);
execute(volume.getCurrentDir(), lazyPersistTask);
}
