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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.geode.internal.memcached.commands;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.Arrays;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import org.apache.geode.cache.Cache;
import org.apache.geode.internal.memcached.Command;
import org.apache.geode.internal.memcached.KeyWrapper;
import org.apache.geode.internal.memcached.RequestReader;
import org.apache.geode.memcached.GemFireMemcachedServer.Protocol;
/**
* general format of the command is:
*
* <command name> <key> <flags> <exptime> <bytes> [noreply]\r\n
*
* After this line, the client sends the data block:
*
* <data block>\r\n
*
*
*/
public abstract class StorageCommand extends AbstractCommand {
/**
* thread pool for scheduling expiration tasks
*/
private static ScheduledExecutorService expiryExecutor =
new ScheduledThreadPoolExecutor(1, new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r);
t.setName("memcached-expiryExecutor");
t.setDaemon(true);
return t;
}
});
private static ConcurrentMap