curator-master/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 java.util.concurrent.Callable;
import org.apache.curator.RetryLoop;
import org.apache.curator.drivers.OperationTrace;
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;

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);

        OperationTrace trace = client.getZookeeperClient().startAdvancedTracer("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.setResponseBytesLength(responseData)
                .setPath(path)
                .setStat(responseStat)
                .commit();

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