/*
* Copyright 1999-2012 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.protocol.memcached;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.util.Map;
import java.util.concurrent.TimeoutException;
import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.MemcachedClientBuilder;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
import net.rubyeye.xmemcached.exception.MemcachedException;
import net.rubyeye.xmemcached.utils.AddrUtil;
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.rpc.Exporter;
import com.alibaba.dubbo.rpc.Invocation;
import com.alibaba.dubbo.rpc.Invoker;
import com.alibaba.dubbo.rpc.Result;
import com.alibaba.dubbo.rpc.RpcException;
import com.alibaba.dubbo.rpc.RpcResult;
import com.alibaba.dubbo.rpc.protocol.AbstractInvoker;
import com.alibaba.dubbo.rpc.protocol.AbstractProtocol;
/**
* MemcachedProtocol
*
* @author william.liangf
*/
public class MemcachedProtocol extends AbstractProtocol {
public static final int DEFAULT_PORT = 11211;
public int getDefaultPort() {
return DEFAULT_PORT;
}
public <T> Exporter<T> export(final Invoker<T> invoker) throws RpcException {
throw new UnsupportedOperationException("Unsupported export memcached service. url: " + invoker.getUrl());
}
public <T> Invoker<T> refer(final Class<T> type, final URL url) throws RpcException {
try {
String address = url.getAddress();
String backup = url.getParameter(Constants.BACKUP_KEY);
if (backup != null && backup.length() > 0) {
address += "," + backup;
}
MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses(address));
final MemcachedClient memcachedClient = builder.build();
final int expiry = url.getParameter("expiry", 0);
final String get = url.getParameter("get", "get");
final String set = url.getParameter("set", Map.class.equals(type) ? "put" : "set");
final String delete = url.getParameter("delete", Map.class.equals(type) ? "remove" : "delete");
return new AbstractInvoker<T>(type, url) {
protected Result doInvoke(Invocation invocation) throws Throwable {
try {
if (get.equals(invocation.getMethodName())) {
if (invocation.getArguments().length != 1) {
throw new IllegalArgumentException("The memcached get method arguments mismatch, must only one arguments. interface: " + type.getName() + ", method: " + invocation.getMethodName() + ", url: " + url);
}
return new RpcResult(memcachedClient.get(String.valueOf(invocation.getArguments()[0])));
} else if (set.equals(invocation.getMethodName())) {
if (invocation.getArguments().length != 2) {
throw new IllegalArgumentException("The memcached set method arguments mismatch, must be two arguments. interface: " + type.getName() + ", method: " + invocation.getMethodName() + ", url: " + url);
}
memcachedClient.set(String.valueOf(invocation.getArguments()[0]), expiry, invocation.getArguments()[1]);
return new RpcResult();
} else if (delete.equals(invocation.getMethodName())) {
if (invocation.getArguments().length != 1) {
throw new IllegalArgumentException("The memcached delete method arguments mismatch, must only one arguments. interface: " + type.getName() + ", method: " + invocation.getMethodName() + ", url: " + url);
}
memcachedClient.delete(String.valueOf(invocation.getArguments()[0]));
return new RpcResult();
} else {
throw new UnsupportedOperationException("Unsupported method " + invocation.getMethodName() + " in memcached service.");
}
} catch (Throwable t) {
RpcException re = new RpcException("Failed to invoke memecached service method. interface: " + type.getName() + ", method: " + invocation.getMethodName() + ", url: " + url + ", cause: " + t.getMessage(), t);
if (t instanceof TimeoutException || t instanceof SocketTimeoutException) {
re.setCode(RpcException.TIMEOUT_EXCEPTION);
} else if (t instanceof MemcachedException || t instanceof IOException) {
re.setCode(RpcException.NETWORK_EXCEPTION);
}
throw re;
}
}
public void destroy() {
super.destroy();
try {
memcachedClient.shutdown();
} catch (Throwable e) {
logger.warn(e.getMessage(), e);
}
}
};
} catch (Throwable t) {
throw new RpcException("Failed to refer memecached service. interface: " + type.getName() + ", url: " + url + ", cause: " + t.getMessage(), t);
}
}
}