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/*
 * 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.rpc;

import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Future;

import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.utils.NetUtils;

public class RpcContext {
	
	private static final ThreadLocal LOCAL = new ThreadLocal() {
		@Override
		protected RpcContext initialValue() {
			return new RpcContext();
		}
	};

	/**
	 * get context.
	 * 
	 * @return context
	 */
	public static RpcContext getContext() {
	    return LOCAL.get();
	}
	
	/**
	 * remove context.
	 * 
	 * @see com.alibaba.dubbo.rpc.filter.ContextFilter
	 */
	public static void removeContext() {
	    LOCAL.remove();
	}

    private Future future;

    private List urls;

    private URL url;

    private String methodName;

    private Class[] parameterTypes;

    private Object[] arguments;

	private InetSocketAddress localAddress;

	private InetSocketAddress remoteAddress;

    private final Map attachments = new HashMap();

    private final Map values = new HashMap();
    
	@Deprecated
    private List> invokers;
    
	@Deprecated
    private Invoker invoker;

//	@Deprecated
//    private Invocation invocation;
    
	protected RpcContext() {
	}

	private boolean isProvider;
    /**
     * is provider side.
     * 
     * @return provider side.
     */
    public boolean isProviderSide() {
        return isProvider;
    }
    public RpcContext setProviderSide(boolean isProvider) {
       this.isProvider=isProvider;
       return this;
    }
    /**
     * is consumer side.
     * 
     * @return consumer side.
     */
    public boolean isConsumerSide() {
        URL url = getUrl();
        if (url == null) {
            return false;
        }
        InetSocketAddress address = getRemoteAddress();
        if (address == null) {
            return false;
        }
        String host;
        if (address.getAddress() == null) {
            host = address.getHostName();
        } else {
            host = address.getAddress().getHostAddress();
        }
        return url.getPort() == address.getPort() && 
                NetUtils.filterLocalHost(url.getIp()).equals(NetUtils.filterLocalHost(host));
    }

    /**
     * get future.
     * 
     * @param 
     * @return future
     */
    @SuppressWarnings("unchecked")
    public  Future getFuture() {
        return (Future) future;
    }

    /**
     * set future.
     * 
     * @param future
     */
    public void setFuture(Future future) {
        this.future = future;
    }

    public List getUrls() {
        return urls == null && url != null ? (List) Arrays.asList(url) : urls;
    }

    public void setUrls(List urls) {
        this.urls = urls;
    }

    public URL getUrl() {
    	throw new UnsupportedOperationException("not support getInvocation method in hsf2");
    }

    public void setUrl(URL url) {
        this.url = url;
    }

    /**
     * get method name.
     * 
     * @return method name.
     */
    public String getMethodName() {
        return methodName;
    }

    public void setMethodName(String methodName) {
        this.methodName = methodName;
    }

    /**
     * get parameter types.
     * 
     * @serial
     */
    public Class[] getParameterTypes() {
        return parameterTypes;
    }

    public void setParameterTypes(Class[] parameterTypes) {
        this.parameterTypes = parameterTypes;
    }

    /**
     * get arguments.
     * 
     * @return arguments.
     */
    public Object[] getArguments() {
        return arguments;
    }

    public void setArguments(Object[] arguments) {
        this.arguments = arguments;
    }

    /**
     * set local address.
     * 
     * @param address
     * @return context
     */
	public RpcContext setLocalAddress(InetSocketAddress address) {
	    this.localAddress = address;
	    return this;
	}

	/**
	 * set local address.
	 * 
	 * @param host
	 * @param port
	 * @return context
	 */
    public RpcContext setLocalAddress(String host, int port) {
        if (port < 0) {
            port = 0;
        }
        this.localAddress = InetSocketAddress.createUnresolved(host, port);
        return this;
    }

	/**
	 * get local address.
	 * 
	 * @return local address
	 */
	public InetSocketAddress getLocalAddress() {
		return localAddress;
	}
	public String getLocalAddressString() {
        return getLocalHost() + ":" + getLocalPort();
    }
    
	/**
	 * get local host name.
	 * 
	 * @return local host name
	 */
	public String getLocalHostName() {
		String host = localAddress == null ? null : localAddress.getHostName();
		if (host == null || host.length() == 0) {
		    return getLocalHost();
		}
		return host;
	}

    /**
     * set remote address.
     * 
     * @param address
     * @return context
     */
    public RpcContext setRemoteAddress(InetSocketAddress address) {
       this.remoteAddress=address;
       return this;
    }
    
    /**
     * set remote address.
     * 
     * @param host
     * @param port
     * @return context
     */
    public RpcContext setRemoteAddress(String host, int port) {
    	 if (port < 0) {
             port = 0;
         }
         this.remoteAddress = InetSocketAddress.createUnresolved(host, port);
         return this;
    }

	/**
	 * get remote address.
	 * 
	 * @return remote address
	 */
	public InetSocketAddress getRemoteAddress() {
		return remoteAddress;
	}
	
	/**
	 * get remote address string.
	 * 
	 * @return remote address string.
	 */
	public String getRemoteAddressString() {
	    return getRemoteHost() + ":" + getRemotePort();
	}
	
	/**
	 * get remote host name.
	 * 
	 * @return remote host name
	 */
	public String getRemoteHostName() {
		return remoteAddress == null ? null : remoteAddress.getHostName();
	}

    /**
     * get local host.
     * 
     * @return local host
     */
    public String getLocalHost() {
        String host = localAddress == null ? null : 
            localAddress.getAddress() == null ? localAddress.getHostName() 
                    : NetUtils.filterLocalHost(localAddress.getAddress().getHostAddress());
        if (host == null || host.length() == 0) {
            return NetUtils.getLocalHost();
        }
        return host;
    }

    /**
     * get local port.
     * 
     * @return port
     */
    public int getLocalPort() {
        return localAddress == null ? 0 : localAddress.getPort();
    }

    /**
     * get remote host.
     * 
     * @return remote host
     */
    public String getRemoteHost() {
        return remoteAddress == null ? null : 
        	remoteAddress.getAddress() == null ? remoteAddress.getHostName() 
                    : NetUtils.filterLocalHost(remoteAddress.getAddress().getHostAddress());
    }

    /**
     * get remote port.
     * 
     * @return remote port
     */
    public int getRemotePort() {
        return remoteAddress == null ? 0 : remoteAddress.getPort();
    }

    /**
     * get attachment.
     * 
     * @param key
     * @return attachment
     */
    public String getAttachment(String key) {
        return attachments.get(key);
    }

    /**
     * set attachment.
     * 
     * @param key
     * @param value
     * @return context
     */
    public RpcContext setAttachment(String key, String value) {
        if (value == null) {
            attachments.remove(key);
        } else {
            attachments.put(key, value);
        }
        return this;
    }

    /**
     * remove attachment.
     * 
     * @param key
     * @return context
     */
    public RpcContext removeAttachment(String key) {
        attachments.remove(key);
        return this;
    }

    /**
     * get attachments.
     * 
     * @return attachments
     */
    public Map getAttachments() {
        return attachments;
    }

    /**
     * set attachments
     * 
     * @param attachment
     * @return context
     */
    public RpcContext setAttachments(Map attachment) {
        this.attachments.clear();
        if (attachment != null && attachment.size() > 0) {
            this.attachments.putAll(attachment);
        }
        return this;
    }
    
    public void clearAttachments() {
        this.attachments.clear();
    }

    /**
     * get values.
     * 
     * @return values
     */
    public Map get() {
        return values;
    }

    /**
     * set value.
     * 
     * @param key
     * @param value
     * @return context
     */
    public RpcContext set(String key, Object value) {
        if (value == null) {
            values.remove(key);
        } else {
            values.put(key, value);
        }
        return this;
    }

    /**
     * remove value.
     * 
     * @param key
     * @return value
     */
    public RpcContext remove(String key) {
        values.remove(key);
        return this;
    }

    /**
     * get value.
     * 
     * @param key
     * @return value
     */
    public Object get(String key) {
        return values.get(key);
    }

    public RpcContext setInvokers(List> invokers) {
        this.invokers = invokers;
        if (invokers != null && invokers.size() > 0) {
            List urls = new ArrayList(invokers.size());
            for (Invoker invoker : invokers) {
                urls.add(invoker.getUrl());
            }
            setUrls(urls);
        }
        return this;
    }

    public RpcContext setInvoker(Invoker invoker) {
        this.invoker = invoker;
        if (invoker != null) {
            setUrl(invoker.getUrl());
        }
        return this;
    }

    public RpcContext setInvocation(Invocation invocation) {
//        this.invocation = invocation;
        if (invocation != null) {
            setMethodName(invocation.getMethodName());
            setParameterTypes(invocation.getParameterTypes());
            setArguments(invocation.getArguments());
        }
        return this;
    }

    /**
     * @deprecated Replace to isProviderSide()
     */
    @Deprecated
    public boolean isServerSide() {
        return isProviderSide();
    }
    
    /**
     * @deprecated Replace to isConsumerSide()
     */
    @Deprecated
    public boolean isClientSide() {
        return isConsumerSide();
    }
    
    /**
     * @deprecated Replace to getUrls()
     */
    @Deprecated
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public List> getInvokers() {
        return invokers == null && invoker != null ? (List)Arrays.asList(invoker) : invokers;
    }

    /**
     * @deprecated Replace to getUrl()
     */
    @Deprecated
    public Invoker getInvoker() {
        throw new UnsupportedOperationException("not support getInvoker method in hsf2");
    }

    /**
     * @deprecated Replace to getMethodName(), getParameterTypes(), getArguments()
     */
    @Deprecated
    public Invocation getInvocation() {
    	throw new UnsupportedOperationException("not support getInvocation method in hsf2");
    }
}




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