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Core Parts of Axis2. This includes Axis2 engine, Client API, Addressing support, etc.,
/*
* 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.axis2.engine;
import org.apache.axis2.AxisFault;
import org.apache.axis2.Constants;
import org.apache.axis2.classloader.ThreadContextDescriptor;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.context.ServiceContext;
import org.apache.axis2.context.ServiceGroupContext;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.AxisServiceGroup;
import org.apache.axis2.description.Parameter;
import org.apache.axis2.i18n.Messages;
import org.apache.axis2.service.Lifecycle;
import org.apache.axis2.util.Loader;
import org.apache.axis2.util.Utils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.PrivilegedAction;
import java.util.Iterator;
/**
* If the service implementation has an init method with 1 or 2 message context as its parameters, then
* the DependencyManager calls the init method with appropriate parameters.
*/
public class DependencyManager {
private static final Log log = LogFactory.getLog(DependencyManager.class);
public final static String SERVICE_INIT_METHOD = "init";
public final static String SERVICE_DESTROY_METHOD = "destroy";
/**
* Initialize a new service object. Essentially, check to see if the object wants to receive
* an init() call - if so, call it.
*
* @param obj the service object
* @param serviceContext the active ServiceContext
* @throws AxisFault if there's a problem initializing
*/
public static void initServiceObject(Object obj, ServiceContext serviceContext)
throws AxisFault {
// This is the way to do things into the future.
if (obj instanceof Lifecycle) {
((Lifecycle)obj).init(serviceContext);
return;
}
// ...however, we also still support the old way for now. Note that introspecting for
// a method like this is something like 10 times slower than the above instanceof check.
Class classToLoad = obj.getClass();
// We can not call classToLoad.getDeclaredMethed() , since there
// can be insatnce where mutiple services extends using one class
// just for init and other reflection methods
Method method = null;
try {
method = classToLoad.getMethod(SERVICE_INIT_METHOD, new Class[]{ServiceContext.class});
} catch (Exception e) {
//We do not need to inform this to user , since this something
// Axis2 is checking to support Session. So if the method is
// not there we should ignore that
}
if (method != null) {
try {
method.invoke(obj, new Object[]{serviceContext});
} catch (IllegalAccessException e) {
log.error("Exception trying to call " + SERVICE_INIT_METHOD, e);
throw new AxisFault("Can not access the method ", e);
} catch (IllegalArgumentException e) {
log.error("Exception trying to call " + SERVICE_INIT_METHOD, e);
throw new AxisFault(" Incorrect arguments ", e);
} catch (InvocationTargetException e) {
log.error("Exception trying to call " + SERVICE_INIT_METHOD, e);
throw new AxisFault(" problem in invocation the method ", e);
}
}
}
/**
* To init all the services in application scope
*
* @param serviceGroupContext the ServiceGroupContext from which to extract all the services
* @throws AxisFault if there's a problem initializing
*/
public static void initService(ServiceGroupContext serviceGroupContext) throws AxisFault {
AxisServiceGroup serviceGroup = serviceGroupContext.getDescription();
Iterator serviceItr = serviceGroup.getServices();
while (serviceItr.hasNext()) {
AxisService axisService = (AxisService) serviceItr.next();
ServiceContext serviceContext = serviceGroupContext.getServiceContext(axisService);
AxisService service = serviceContext.getAxisService();
ClassLoader classLoader = service.getClassLoader();
Parameter implInfoParam = service.getParameter(Constants.SERVICE_CLASS);
if (implInfoParam != null) {
try {
ThreadContextDescriptor tc = ThreadContextDescriptor.setThreadContext(axisService);
Class implClass = Loader.loadClass(
classLoader,
((String) implInfoParam.getValue()).trim());
Object serviceImpl = makeNewServiceObject(service);
serviceContext.setProperty(ServiceContext.SERVICE_OBJECT, serviceImpl);
initServiceObject(serviceImpl, serviceContext);
restoreThreadContext(tc);
} catch (Exception e) {
throw AxisFault.makeFault(e);
}
}
}
}
protected static Object makeNewServiceObject(AxisService service) throws AxisFault {
Object serviceObject = Utils.createServiceObject(service);
if (serviceObject == null) {
throw new AxisFault(
Messages.getMessage("paramIsNotSpecified", "SERVICE_OBJECT_SUPPLIER"));
} else {
return serviceObject;
}
}
/**
* Notify a service object that it's on death row.
* @param serviceContext the active ServiceContext
*/
public static void destroyServiceObject(ServiceContext serviceContext) {
Object obj = serviceContext.getProperty(ServiceContext.SERVICE_OBJECT);
if (obj != null) {
// If this is a Lifecycle object, just call it.
if (obj instanceof Lifecycle) {
((Lifecycle)obj).destroy(serviceContext);
return;
}
// For now, we also use "raw" introspection to try and find the destroy method.
Class classToLoad = obj.getClass();
Method method =
null;
try {
method = classToLoad.getMethod(SERVICE_DESTROY_METHOD, new Class[]{ServiceContext.class});
} catch (NoSuchMethodException e) {
//We do not need to inform this to user , since this something
// Axis2 is checking to support Session. So if the method is
// not there we should ignore that
}
if(method!=null){
try {
method.invoke(obj, new Object[]{serviceContext});
} catch (IllegalAccessException e) {
log.info("Exception trying to call " + SERVICE_DESTROY_METHOD, e);
} catch (InvocationTargetException e) {
log.info("Exception trying to call " + SERVICE_DESTROY_METHOD, e);
}
}
}
}
protected static void restoreThreadContext(final ThreadContextDescriptor tc) {
org.apache.axis2.java.security.AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
Thread.currentThread().setContextClassLoader(tc.getOldClassLoader());
return null;
}
});
MessageContext.currentMessageContext.set(tc.getOldMessageContext());
}
}
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