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RequestStartAsyncInterceptor.java
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RequestStartAsyncInterceptor.java
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/*
* Copyright 2018 NAVER Corp.
*
* 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.navercorp.pinpoint.plugin.jetty.interceptor;
import com.navercorp.pinpoint.bootstrap.context.MethodDescriptor;
import com.navercorp.pinpoint.bootstrap.context.SpanEventRecorder;
import com.navercorp.pinpoint.bootstrap.context.Trace;
import com.navercorp.pinpoint.bootstrap.context.TraceContext;
import com.navercorp.pinpoint.bootstrap.interceptor.AroundInterceptor;
import com.navercorp.pinpoint.bootstrap.logging.PLogger;
import com.navercorp.pinpoint.bootstrap.logging.PLoggerFactory;
import com.navercorp.pinpoint.plugin.jetty.JettyAsyncListener;
import com.navercorp.pinpoint.plugin.jetty.JettyConstants;
import javax.servlet.AsyncContext;
import javax.servlet.AsyncListener;
import javax.servlet.http.HttpServletRequest;
/**
* @author jaehong.kim
*/
public class RequestStartAsyncInterceptor implements AroundInterceptor {
private final PLogger logger = PLoggerFactory.getLogger(this.getClass());
private final boolean isDebug = logger.isDebugEnabled();
private final TraceContext traceContext;
private final MethodDescriptor descriptor;
public RequestStartAsyncInterceptor(TraceContext traceContext, MethodDescriptor descriptor) {
this.traceContext = traceContext;
this.descriptor = descriptor;
}
@Override
public void before(Object target, Object[] args) {
if (isDebug) {
logger.beforeInterceptor(target, args);
}
final Trace trace = currentTrace();
if (trace == null) {
return;
}
trace.traceBlockBegin();
}
private Trace currentTrace() {
return traceContext.currentRawTraceObject();
}
@Override
public void after(Object target, Object[] args, Object result, Throwable throwable) {
if (isDebug) {
logger.afterInterceptor(target, args, result, throwable);
}
final Trace trace = currentTrace();
if (trace == null) {
return;
}
try {
final SpanEventRecorder recorder = trace.currentSpanEventRecorder();
if (validate(target, result, throwable)) {
// Add async listener. Servlet 3.0
final AsyncContext asyncContext = (AsyncContext) result;
final AsyncListener asyncListener = new JettyAsyncListener(this.traceContext, recorder.recordNextAsyncContext(true));
asyncContext.addListener(asyncListener);
if (isDebug) {
logger.debug("Add async listener {}", asyncListener);
}
}
recorder.recordServiceType(JettyConstants.JETTY_METHOD);
recorder.recordApi(descriptor);
recorder.recordException(throwable);
} catch (Throwable t) {
logger.warn("Failed to AFTER process. {}", t.getMessage(), t);
} finally {
trace.traceBlockEnd();
}
}
private boolean validate(final Object target, final Object result, final Throwable throwable) {
if (throwable != null || result == null) {
return false;
}
if (!(target instanceof HttpServletRequest)) {
logger.debug("Invalid target object. {}", target);
return false;
}
if (!(result instanceof AsyncContext)) {
logger.debug("Invalid result object. {}.", result);
return false;
}
return true;
}
}