// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License.  Citrix Systems, Inc.
// reserves all rights not expressly granted by 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.
// 
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.utils.nio;

import org.apache.log4j.Logger;



/**
 * Task represents one todo item for the AgentManager or the AgentManager
 *
 */
public abstract class Task implements Runnable {
	private static final Logger s_logger = Logger.getLogger(Task.class);
	
    public enum Type {
        CONNECT,     // Process a new connection.
        DISCONNECT,  // Process an existing connection disconnecting.
        DATA,        // data incoming.
        CONNECT_FAILED, // Connection failed.
        OTHER        // Allows other tasks to be defined by the caller.
    };
    
    Object _data;
    Type _type;
    Link _link;

    public Task(Type type, Link link, byte[] data) {
        _data = data;
        _type = type;
        _link = link;
    }
    
    public Task(Type type, Link link, Object data) {
        _data = data;
        _type = type;
        _link = link;
    }
    
    protected Task() {
    }
    
    public Type getType() {
        return _type;
    }
    
    public Link getLink() {
        return _link;
    }
    
    public byte[] getData() {
        return (byte[])_data;
    }
    
    public Object get() {
        return _data;
    }
    
    @Override
	public String toString() {
        return _type.toString();
    }
    
    abstract protected void doTask(Task task) throws Exception;
    
    @Override
    public final void run() {
    	try {
    		doTask(this);
    	} catch (Throwable e) {
    		s_logger.warn("Caught the following exception but pushing on", e);
    	} 
    }
}