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Example 1 with EMPTY_BYTES

use of org.apache.distributedlog.DistributedLogConstants.EMPTY_BYTES in project bookkeeper by apache.

the class ZKLogStreamMetadataStore method renameLogMetadata.

private CompletableFuture<Void> renameLogMetadata(URI uri, LogMetadataForWriter oldMetadata, String newStreamName) {
    final LinkedList<Op> createOps = Lists.newLinkedList();
    final LinkedList<Op> deleteOps = Lists.newLinkedList();
    List<ACL> acls = zooKeeperClient.getDefaultACL();
    // get the root path
    String oldRootPath = oldMetadata.getLogRootPath();
    String newRootPath = LogMetadata.getLogRootPath(uri, newStreamName, conf.getUnpartitionedStreamName());
    // 0. the log path
    deleteOps.addFirst(Op.delete(LogMetadata.getLogStreamPath(uri, oldMetadata.getLogName()), -1));
    // 1. the root path
    createOps.addLast(Op.create(newRootPath, EMPTY_BYTES, acls, CreateMode.PERSISTENT));
    deleteOps.addFirst(Op.delete(oldRootPath, -1));
    // 2. max id
    Versioned<byte[]> maxTxIdData = oldMetadata.getMaxTxIdData();
    deleteOldPathAndCreateNewPath(oldRootPath, MAX_TXID_PATH, maxTxIdData, newRootPath, DLUtils.serializeTransactionId(0L), acls, createOps, deleteOps);
    // 3. version
    createOps.addLast(Op.create(newRootPath + VERSION_PATH, intToBytes(LAYOUT_VERSION), acls, CreateMode.PERSISTENT));
    deleteOps.addFirst(Op.delete(oldRootPath + VERSION_PATH, -1));
    // 4. lock path (NOTE: if the stream is locked by a writer, then the delete will fail as you can not
    // delete the lock path if children is not empty.
    createOps.addLast(Op.create(newRootPath + LOCK_PATH, EMPTY_BYTES, acls, CreateMode.PERSISTENT));
    deleteOps.addFirst(Op.delete(oldRootPath + LOCK_PATH, -1));
    // 5. read lock path (NOTE: same reason as the write lock)
    createOps.addLast(Op.create(newRootPath + READ_LOCK_PATH, EMPTY_BYTES, acls, CreateMode.PERSISTENT));
    deleteOps.addFirst(Op.delete(oldRootPath + READ_LOCK_PATH, -1));
    // 6. allocation path
    Versioned<byte[]> allocationData = oldMetadata.getAllocationData();
    deleteOldPathAndCreateNewPath(oldRootPath, ALLOCATION_PATH, allocationData, newRootPath, EMPTY_BYTES, acls, createOps, deleteOps);
    // 7. log segments
    Versioned<byte[]> maxLSSNData = oldMetadata.getMaxLSSNData();
    deleteOldPathAndCreateNewPath(oldRootPath, LOGSEGMENTS_PATH, maxLSSNData, newRootPath, DLUtils.serializeLogSegmentSequenceNumber(UNASSIGNED_LOGSEGMENT_SEQNO), acls, createOps, deleteOps);
    // 8. copy the log segments
    CompletableFuture<List<LogSegmentMetadata>> segmentsFuture;
    if (pathExists(maxLSSNData)) {
        segmentsFuture = getLogSegments(zooKeeperClient, oldRootPath + LOGSEGMENTS_PATH);
    } else {
        segmentsFuture = FutureUtils.value(Collections.emptyList());
    }
    return segmentsFuture.thenApply(segments -> {
        for (LogSegmentMetadata segment : segments) {
            deleteOldSegmentAndCreateNewSegment(segment, newRootPath + LOGSEGMENTS_PATH, acls, createOps, deleteOps);
        }
        return null;
    }).thenCompose(ignored -> getMissingPaths(zooKeeperClient, uri, newStreamName)).thenCompose(paths -> {
        for (String path : paths) {
            createOps.addFirst(Op.create(path, EMPTY_BYTES, acls, CreateMode.PERSISTENT));
        }
        return executeRenameTxn(oldRootPath, newRootPath, createOps, deleteOps);
    });
}
Also used : CreateMode(org.apache.zookeeper.CreateMode) LogExistsException(org.apache.distributedlog.exceptions.LogExistsException) ZKDistributedLock(org.apache.distributedlog.lock.ZKDistributedLock) LogSegmentMetadataStore(org.apache.distributedlog.logsegment.LogSegmentMetadataStore) LoggerFactory(org.slf4j.LoggerFactory) PermitManager(org.apache.distributedlog.common.util.PermitManager) LogMetadataForReader(org.apache.distributedlog.metadata.LogMetadataForReader) Stat(org.apache.zookeeper.data.Stat) LogNotFoundException(org.apache.distributedlog.exceptions.LogNotFoundException) LOGSEGMENTS_PATH(org.apache.distributedlog.metadata.LogMetadata.LOGSEGMENTS_PATH) Preconditions.checkArgument(com.google.common.base.Preconditions.checkArgument) UnexpectedException(org.apache.distributedlog.exceptions.UnexpectedException) Optional(com.google.common.base.Optional) READ_LOCK_PATH(org.apache.distributedlog.metadata.LogMetadata.READ_LOCK_PATH) SchedulerUtils(org.apache.distributedlog.common.util.SchedulerUtils) Transaction(org.apache.distributedlog.util.Transaction) URI(java.net.URI) DistributedLogConstants(org.apache.distributedlog.DistributedLogConstants) ZKUtil(org.apache.zookeeper.ZKUtil) ZKException(org.apache.distributedlog.exceptions.ZKException) ZooKeeper(org.apache.zookeeper.ZooKeeper) Op(org.apache.zookeeper.Op) OrderedScheduler(org.apache.bookkeeper.common.util.OrderedScheduler) CancellationException(java.util.concurrent.CancellationException) FutureUtils(org.apache.bookkeeper.common.concurrent.FutureUtils) Create(org.apache.zookeeper.Op.Create) List(java.util.List) LockCancelledException(org.apache.distributedlog.exceptions.LockCancelledException) StatsLogger(org.apache.bookkeeper.stats.StatsLogger) ZKLogSegmentMetadataStore(org.apache.distributedlog.impl.ZKLogSegmentMetadataStore) EMPTY_BYTES(org.apache.distributedlog.DistributedLogConstants.EMPTY_BYTES) Code(org.apache.zookeeper.KeeperException.Code) LongVersion(org.apache.bookkeeper.versioning.LongVersion) DLInterruptedException(org.apache.distributedlog.exceptions.DLInterruptedException) LockingException(org.apache.distributedlog.exceptions.LockingException) CompletableFuture(java.util.concurrent.CompletableFuture) ACL(org.apache.zookeeper.data.ACL) UTF_8(com.google.common.base.Charsets.UTF_8) LOCK_PATH(org.apache.distributedlog.metadata.LogMetadata.LOCK_PATH) ZooKeeperConnectionException(org.apache.distributedlog.ZooKeeperClient.ZooKeeperConnectionException) Lists(com.google.common.collect.Lists) LogSegmentMetadata(org.apache.distributedlog.LogSegmentMetadata) DistributedLogConfiguration(org.apache.distributedlog.DistributedLogConfiguration) Versioned(org.apache.bookkeeper.versioning.Versioned) Utils(org.apache.distributedlog.util.Utils) LimitedPermitManager(org.apache.distributedlog.zk.LimitedPermitManager) ZKTransaction(org.apache.distributedlog.zk.ZKTransaction) OpResult(org.apache.zookeeper.OpResult) LinkedList(java.util.LinkedList) LogStreamMetadataStore(org.apache.distributedlog.metadata.LogStreamMetadataStore) Delete(org.apache.zookeeper.Op.Delete) Logger(org.slf4j.Logger) LAYOUT_VERSION(org.apache.distributedlog.metadata.LogMetadata.LAYOUT_VERSION) FutureEventListener(org.apache.bookkeeper.common.concurrent.FutureEventListener) KeeperException(org.apache.zookeeper.KeeperException) Preconditions.checkNotNull(com.google.common.base.Preconditions.checkNotNull) ALLOCATION_PATH(org.apache.distributedlog.metadata.LogMetadata.ALLOCATION_PATH) IOException(java.io.IOException) MAX_TXID_PATH(org.apache.distributedlog.metadata.LogMetadata.MAX_TXID_PATH) LogMetadata(org.apache.distributedlog.metadata.LogMetadata) TimeUnit(java.util.concurrent.TimeUnit) DLUtils(org.apache.distributedlog.util.DLUtils) DistributedLock(org.apache.distributedlog.lock.DistributedLock) PathUtils(org.apache.zookeeper.common.PathUtils) LogMetadataForWriter(org.apache.distributedlog.metadata.LogMetadataForWriter) AsyncCallback(org.apache.zookeeper.AsyncCallback) VisibleForTesting(com.google.common.annotations.VisibleForTesting) ZKSessionLockFactory(org.apache.distributedlog.lock.ZKSessionLockFactory) UNASSIGNED_LOGSEGMENT_SEQNO(org.apache.distributedlog.DistributedLogConstants.UNASSIGNED_LOGSEGMENT_SEQNO) Collections(java.util.Collections) InvalidStreamNameException(org.apache.distributedlog.exceptions.InvalidStreamNameException) VERSION_PATH(org.apache.distributedlog.metadata.LogMetadata.VERSION_PATH) ZooKeeperClient(org.apache.distributedlog.ZooKeeperClient) SessionLockFactory(org.apache.distributedlog.lock.SessionLockFactory) Op(org.apache.zookeeper.Op) LogSegmentMetadata(org.apache.distributedlog.LogSegmentMetadata) ACL(org.apache.zookeeper.data.ACL) List(java.util.List) LinkedList(java.util.LinkedList)

Aggregations

VisibleForTesting (com.google.common.annotations.VisibleForTesting)1 UTF_8 (com.google.common.base.Charsets.UTF_8)1 Optional (com.google.common.base.Optional)1 Preconditions.checkArgument (com.google.common.base.Preconditions.checkArgument)1 Preconditions.checkNotNull (com.google.common.base.Preconditions.checkNotNull)1 Lists (com.google.common.collect.Lists)1 IOException (java.io.IOException)1 URI (java.net.URI)1 Collections (java.util.Collections)1 LinkedList (java.util.LinkedList)1 List (java.util.List)1 CancellationException (java.util.concurrent.CancellationException)1 CompletableFuture (java.util.concurrent.CompletableFuture)1 TimeUnit (java.util.concurrent.TimeUnit)1 FutureEventListener (org.apache.bookkeeper.common.concurrent.FutureEventListener)1 FutureUtils (org.apache.bookkeeper.common.concurrent.FutureUtils)1 OrderedScheduler (org.apache.bookkeeper.common.util.OrderedScheduler)1 StatsLogger (org.apache.bookkeeper.stats.StatsLogger)1 LongVersion (org.apache.bookkeeper.versioning.LongVersion)1 Versioned (org.apache.bookkeeper.versioning.Versioned)1