/* 
 * Copyright (c) 2008-2010, Hazel Ltd. All Rights Reserved.
 * 
 * Licensed 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 com.hazelcast.client;

import com.hazelcast.core.Transaction;

import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

public final class ClientThreadContext {
    private static final ConcurrentMap<Thread, ClientThreadContext> mapContexts = new ConcurrentHashMap<Thread, ClientThreadContext>(100);
    private static final Object lock = new Object();
    TransactionClientProxy transactionProxy;
    final ClientSerializer serializer = new ClientSerializer();
    final Thread thread;

    public ClientThreadContext(Thread thread) {
        this.thread = thread;
    }

    public static ClientThreadContext get() {
        Thread currentThread = Thread.currentThread();
        ClientThreadContext threadContext = mapContexts.get(currentThread);
        if (threadContext == null) {
            threadContext = new ClientThreadContext(currentThread);
            mapContexts.put(currentThread, threadContext);
            Iterator<Thread> threads = mapContexts.keySet().iterator();
            while (threads.hasNext()) {
                Thread thread = threads.next();
                if (!thread.isAlive()) {
                    threads.remove();
                }
            }
        }
        return threadContext;
    }

    public static void shutdown() {
        mapContexts.clear();
    }

    public Transaction getTransaction(HazelcastClient client) {
        if (transactionProxy == null) {
            synchronized (lock) {
                if (transactionProxy == null) {
                    transactionProxy = new TransactionClientProxy(null, client);
                }
            }
        }
        return transactionProxy;
    }

    public void removeTransaction() {
        transactionProxy = null;
    }

    public byte[] toByte(Object object) {
        return serializer.toByteArray(object);
    }

    public Object toObject(byte[] bytes) {
        return serializer.toObject(bytes);
    }
}

@@ -996,61 +996,8 @@
 0);%0A
-    private static final Object lock = new Object();%0A
     
@@ -2051,98 +2051,8 @@
 ) %7B%0A
-            synchronized (lock) %7B%0A                if (transactionProxy == null) %7B%0A        
     
@@ -2124,40 +2124,8 @@
 t);%0A
-                %7D%0A            %7D%0A
     

There is no need for the lock instance.