Java Code Examples for org.apache.zookeeper.ZooKeeper#multi()

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Example 1
Source File: ZKLogStreamMetadataStore.java    From distributedlog with Apache License 2.0 4 votes vote down vote up 
private static void executeCreateMissingPathTxn(ZooKeeper zk,
                                                List<Op> zkOps,
                                                List<byte[]> pathsToCreate,
                                                List<Versioned<byte[]>> metadatas,
                                                String logRootPath,
                                                CompletableFuture<List<Versioned<byte[]>>> promise) {

    zk.multi(zkOps, new AsyncCallback.MultiCallback() {
        @Override
        public void processResult(int rc, String path, Object ctx, List<OpResult> resultList) {
            if (KeeperException.Code.OK.intValue() == rc) {
                List<Versioned<byte[]>> finalMetadatas =
                        Lists.newArrayListWithExpectedSize(metadatas.size());
                for (int i = 0; i < pathsToCreate.size(); i++) {
                    byte[] dataCreated = pathsToCreate.get(i);
                    if (null == dataCreated) {
                        finalMetadatas.add(metadatas.get(i));
                    } else {
                        finalMetadatas.add(new Versioned<byte[]>(dataCreated, new LongVersion(0)));
                    }
                }
                promise.complete(finalMetadatas);
            } else if (KeeperException.Code.NODEEXISTS.intValue() == rc) {
                promise.completeExceptionally(new LogExistsException("Someone just created log "
                        + logRootPath));
            } else {
                if (LOG.isDebugEnabled()) {
                    StringBuilder builder = new StringBuilder();
                    for (OpResult result : resultList) {
                        if (result instanceof OpResult.ErrorResult) {
                            OpResult.ErrorResult errorResult = (OpResult.ErrorResult) result;
                            builder.append(errorResult.getErr()).append(",");
                        } else {
                            builder.append(0).append(",");
                        }
                    }
                    String resultCodeList = builder.substring(0, builder.length() - 1);
                    LOG.debug("Failed to create log, full rc list = {}", resultCodeList);
                }

                promise.completeExceptionally(new ZKException("Failed to create log " + logRootPath,
                        KeeperException.Code.get(rc)));
            }
        }
    }, null);
}