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/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.csp.sentinel.adapter.dubbo;
import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.EntryType;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.Tracer;
import com.alibaba.csp.sentinel.adapter.dubbo.fallback.DubboFallbackRegistry;
import com.alibaba.csp.sentinel.context.ContextUtil;
import com.alibaba.csp.sentinel.log.RecordLog;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.rpc.Filter;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
/**
* <p>Apache Dubbo service provider filter that enables integration with Sentinel. Auto activated by default.</p>
* <p>Note: this only works for Apache Dubbo 2.7.x or above version.</p>
*
* If you want to disable the provider filter, you can configure:
* <pre>
* &lt;dubbo:provider filter="-sentinel.dubbo.provider.filter"/&gt;
* </pre>
*
* @author Carpenter Lee
* @author Eric Zhao
*/
@Activate(group = "provider")
public class SentinelDubboProviderFilter implements Filter {
public SentinelDubboProviderFilter() {
RecordLog.info("Sentinel Apache Dubbo provider filter initialized");
}
@Override
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
// Get origin caller.
String application = DubboUtils.getApplication(invocation, "");
Entry interfaceEntry = null;
Entry methodEntry = null;
try {
String resourceName = DubboUtils.getResourceName(invoker, invocation);
String interfaceName = invoker.getInterface().getName();
// Only need to create entrance context at provider side, as context will take effect
// at entrance of invocation chain only (for inbound traffic).
ContextUtil.enter(resourceName, application);
interfaceEntry = SphU.entry(interfaceName, EntryType.IN);
methodEntry = SphU.entry(resourceName, EntryType.IN, 1, invocation.getArguments());
Result result = invoker.invoke(invocation);
if (result.hasException()) {
Throwable e = result.getException();
// Record common exception.
Tracer.traceEntry(e, interfaceEntry);
Tracer.traceEntry(e, methodEntry);
}
return result;
} catch (BlockException e) {
return DubboFallbackRegistry.getProviderFallback().handle(invoker, invocation, e);
} catch (RpcException e) {
Tracer.traceEntry(e, interfaceEntry);
Tracer.traceEntry(e, methodEntry);
throw e;
} finally {
if (methodEntry != null) {
methodEntry.exit(1, invocation.getArguments());
}
if (interfaceEntry != null) {
interfaceEntry.exit();
}
ContextUtil.exit();
}
}
}