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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.policy.logging.jdk;
import java.util.List;
import java.util.logging.ConsoleHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.invocation.PhasedInterceptor;
import org.apache.tuscany.sca.policy.PolicySubject;
/**
* Policy handler to handle PolicySet related to Logging with the QName
* {http://tuscany.apache.org/xmlns/sca/1.1/impl/java}LoggingPolicy
*
* @version $Rev$ $Date$
*/
public class JDKLoggingPolicyInterceptor implements PhasedInterceptor {
public static final String loggingPolicy = "JDKLoggingPolicy";
public static final QName policySetQName = new QName(JDKLoggingPolicy.SCA11_TUSCANY_NS, loggingPolicy);
private Logger logger = null;
private Invoker next;
private Operation operation;
private List<JDKLoggingPolicy> policies;
private PolicySubject subject;
private String context;
private String phase;
public JDKLoggingPolicyInterceptor(PolicySubject subject,
String context,
Operation operation,
List<JDKLoggingPolicy> policies,
String phase) {
super();
this.operation = operation;
this.policies = policies;
this.subject = subject;
this.phase = phase;
this.context = getContext();
init();
}
private String getContext() {
if (subject instanceof Endpoint) {
Endpoint endpoint = (Endpoint)subject;
return endpoint.getURI();
} else if (subject instanceof EndpointReference) {
EndpointReference endpointReference = (EndpointReference)subject;
return endpointReference.getURI();
} else if (subject instanceof Component) {
Component component = (Component)subject;
return component.getURI();
}
return null;
}
private void init() {
JDKLoggingPolicy policy = policies.get(0);
logger = Logger.getLogger(policy.getLoggerName());
logger.setLevel(policy.getLogLevel());
logger.setUseParentHandlers(policy.isUseParentHandlers());
boolean found = false;
for (Handler handler : logger.getHandlers()) {
if (handler instanceof ConsoleHandler) {
found = true;
break;
}
}
if (!found) {
ConsoleHandler consoleHandler = new ConsoleHandler();
consoleHandler.setLevel(Level.ALL);
logger.addHandler(consoleHandler);
}
if (logger.isLoggable(Level.FINE)) {
logger.logp(Level.FINE, context, "", "Intents: {0}", subject.getRequiredIntents());
logger.logp(Level.FINE, context, "", "PolicySets: {0}", subject.getPolicySets());
}
}
public Message invoke(Message msg) {
if (logger == null) {
return getNext().invoke(msg);
}
logger.logp(Level.INFO, context, "", "Invoking operation - " + operation.getName());
Object msgBody = msg.getBody();
if (msgBody instanceof Object[]) {
if (logger.isLoggable(Level.FINE)) {
StringBuffer sb = new StringBuffer();
if (msgBody == null) {
sb.append("");
} else {
Object[] args = (Object[])msgBody;
for (int i = 0; i < args.length; i++) {
sb.append(args[i]);
if (i != args.length - 1) {
sb.append(", ");
}
}
}
Object[] logParams = new Object[] {operation.getName(), sb.toString()};
logger.logp(Level.FINE, context, "", "Invoking operation {0} with arguments {1}", logParams);
}
}
Message responseMsg = null;
try {
responseMsg = getNext().invoke(msg);
return responseMsg;
} catch (RuntimeException e) {
logger.logp(Level.SEVERE, context, "", "Exception thrown from operation - " + operation.getName(), e);
throw e;
} finally {
if (responseMsg != null) {
logger.logp(Level.INFO, context, "", "Returned from operation - " + operation.getName());
if (logger.isLoggable(Level.FINE)) {
Object[] logParams = new Object[] {operation.getName(), responseMsg.getBody()};
logger.logp(Level.FINE,
context,
"",
"Returning from operation {0} with return value {1}",
logParams);
}
}
}
}
public Invoker getNext() {
return next;
}
public void setNext(Invoker next) {
this.next = next;
}
public String getPhase() {
return phase;
}
}
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