curator-framework/src/main/java/org/apache/curator/framework/imps/TempGetDataBuilderImpl.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.curator.framework.imps;

import org.apache.curator.RetryLoop;
import org.apache.curator.TimeTrace;
import org.apache.curator.framework.api.Pathable;
import org.apache.curator.framework.api.StatPathable;
import org.apache.curator.framework.api.TempGetDataBuilder;
import org.apache.zookeeper.data.Stat;
import java.util.concurrent.Callable;

class TempGetDataBuilderImpl implements TempGetDataBuilder
{
    private final CuratorFrameworkImpl  client;
    private Stat                        responseStat;
    private boolean                     decompress;

    TempGetDataBuilderImpl(CuratorFrameworkImpl client)
    {
        this.client = client;
        responseStat = null;
        decompress = false;
    }

    @Override
    public StatPathable<byte[]> decompressed()
    {
        decompress = true;
        return this;
    }

    @Override
    public Pathable<byte[]> storingStatIn(Stat stat)
    {
        responseStat = stat;
        return this;
    }

    @Override
    public byte[] forPath(String path) throws Exception
    {
        final String    localPath = client.fixForNamespace(path);

        TimeTrace       trace = client.getZookeeperClient().startTracer("GetDataBuilderImpl-Foreground");
        byte[]          responseData = RetryLoop.callWithRetry
        (
            client.getZookeeperClient(),
            new Callable<byte[]>()
            {
                @Override
                public byte[] call() throws Exception
                {
                    return client.getZooKeeper().getData(localPath, false, responseStat);
                }
            }
        );
        trace.commit();

        return decompress ? client.getCompressionProvider().decompress(path, responseData) : responseData;
    }
}