/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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.alibaba.dubbo.remoting.handler;

import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.atomic.AtomicInteger;

import junit.framework.Assert;

import org.junit.Before;
import org.junit.Test;

import com.alibaba.dubbo.remoting.ExecutionException;
import com.alibaba.dubbo.remoting.RemotingException;
import com.alibaba.dubbo.remoting.exchange.Request;
import com.alibaba.dubbo.remoting.exchange.Response;
import com.alibaba.dubbo.remoting.transport.dispather.connection.ConnectionOrderedChannelHandler;


public class ConnectChannelHandlerTest extends WrappedChannelHandlerTest{

    @Before
    public void setUp() throws Exception {
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(true), url);
    }
    
    @Test
    public void test_Connect_Blocked() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(false), url);
        ThreadPoolExecutor executor = (ThreadPoolExecutor)getField(handler, "connectionExecutor", 1);
        Assert.assertEquals(1, executor.getMaximumPoolSize());
        
        int runs = 20;
        int taskCount = runs * 2;
        for(int i=0; i<runs;i++){
            handler.connected(new MockedChannel());
            handler.disconnected(new MockedChannel());
            Assert.assertTrue(executor.getActiveCount() + " must <=1" ,executor.getActiveCount() <= 1);
        }
        //queue.size 
        Assert.assertEquals(taskCount -1 , executor.getQueue().size());
        
        for( int i=0;i<taskCount; i++){
            if (executor.getCompletedTaskCount() < taskCount){
                sleep(100);
            }
        }
        Assert.assertEquals(taskCount, executor.getCompletedTaskCount());        
    }
    
    @Test //biz error 不抛出到线程异常上来.
    public void test_Connect_Biz_Error() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(true), url);
        handler.connected(new MockedChannel());
    }
    @Test //biz error 不抛出到线程异常上来.
    public void test_Disconnect_Biz_Error() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(true), url);
        handler.disconnected(new MockedChannel());
    }
    
    @Test(expected = ExecutionException.class)
    public void test_Connect_Execute_Error() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(false), url);
        ThreadPoolExecutor executor = (ThreadPoolExecutor)getField(handler, "connectionExecutor", 1);
        executor.shutdown();
        handler.connected(new MockedChannel());
    }
    @Test(expected = ExecutionException.class)
    public void test_Disconnect_Execute_Error() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(false), url);
        ThreadPoolExecutor executor = (ThreadPoolExecutor)getField(handler, "connectionExecutor", 1);
        executor.shutdown();
        handler.disconnected(new MockedChannel());
    }
    //throw  ChannelEventRunnable.runtimeExeception(int logger) not in execute exception
    @Test//(expected = RemotingException.class)
    public void test_MessageReceived_Biz_Error() throws RemotingException{
        handler.received(new MockedChannel(),"");
    }
    //throw  ChannelEventRunnable.runtimeExeception(int logger) not in execute exception
    @Test
    public void test_Caught_Biz_Error() throws RemotingException{
        handler.caught(new MockedChannel(), new BizException());
    }
    @Test(expected = ExecutionException.class)
    public void test_Received_InvokeInExecuter() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(false), url);
        ThreadPoolExecutor executor = (ThreadPoolExecutor)getField(handler, "SHARED_EXECUTOR", 1);
        executor.shutdown();
        executor = (ThreadPoolExecutor)getField(handler, "executor", 1);
        executor.shutdown();
        handler.received(new MockedChannel(), "");
    }
    
    /**
     * 事件不通过线程池，直接在IO上执行
     */
    @SuppressWarnings("deprecation")
    @Test
    public void test_Received_Event_invoke_direct() throws RemotingException{
        handler = new ConnectionOrderedChannelHandler(new BizChannelHander(false), url);
        ThreadPoolExecutor executor = (ThreadPoolExecutor)getField(handler, "SHARED_EXECUTOR", 1);
        executor.shutdown();
        executor = (ThreadPoolExecutor)getField(handler, "executor", 1);
        executor.shutdown();
        Request req = new Request();
        req.setHeartbeat(true);
        final AtomicInteger count = new AtomicInteger(0);
        handler.received(new MockedChannel(){
            @Override
            public void send(Object message) throws RemotingException {
                Assert.assertEquals("response.heartbeat", true, ((Response)message).isHeartbeat());
                count.incrementAndGet();
            }
        }, req);
        Assert.assertEquals("channel.send must be invoke", 1, count.get());
    }
}