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This module contains the Metro runtime code.
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.xml.rpc.server.http;
import java.rmi.Remote;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.xml.rpc.JAXRPCException;
import javax.xml.rpc.ServiceException;
import com.sun.xml.rpc.server.Tie;
/**
*
* @author JAX-RPC Development Team
*/
public class ImplementorCacheDelegateImpl
extends com.sun.xml.rpc.spi.runtime.ImplementorCacheDelegate {
public ImplementorCacheDelegateImpl(ServletConfig servletConfig) {
this.servletConfig = servletConfig;
this.servletContext = servletConfig.getServletContext();
cachedImplementors = new HashMap();
}
// bug fix: 4900801 - have the signature exactly as of
// com.sun.xml.rpc.spi.runtime.ImplementorCacheDelegate() so that this
// method gets called and not the one with the superclass.
public com.sun.xml.rpc.spi.runtime.Implementor getImplementorFor(
com.sun.xml.rpc.spi.runtime.RuntimeEndpointInfo targetEndpoint) {
synchronized (this) {
Implementor implementor =
(Implementor) cachedImplementors.get(targetEndpoint);
if (implementor != null) {
return implementor;
}
}
// NOTE - here we avoid synchronizing so that if an init() method never
// terminates, we don't block the whole JAX-RPC dispatching engine
// the drawback is that sometimes we create multiple implementors for
// the same endpoint, and all but one will be destroyed immediately
// thereafter
try {
if (servletConfig != null) {
Tie tie = (Tie) targetEndpoint.getTieClass().newInstance();
Remote servant =
(Remote) targetEndpoint
.getImplementationClass()
.newInstance();
tie.setTarget(servant);
Implementor implementor = new Implementor(servletContext, tie);
implementor.init();
postImplementorInit(
implementor,
(RuntimeEndpointInfo) targetEndpoint);
Implementor existingImplementor = null;
synchronized (this) {
existingImplementor =
(Implementor) cachedImplementors.get(targetEndpoint);
if (existingImplementor == null) {
cachedImplementors.put(targetEndpoint, implementor);
}
}
if (existingImplementor == null) {
return implementor;
} else {
// it turns out we don't need the new implementor we just
// constructed!
preImplementorDestroy(implementor);
implementor.destroy();
return existingImplementor;
}
} else {
// NOTE - this branch is only used by some unit tests
// as it does NOT include the necessary synchronization code
Tie tie = (Tie) targetEndpoint.getTieClass().newInstance();
Remote servant =
(Remote) targetEndpoint
.getImplementationClass()
.newInstance();
tie.setTarget(servant);
Implementor implementor = new Implementor(null, tie);
cachedImplementors.put(targetEndpoint, implementor);
return implementor;
}
} catch (IllegalAccessException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
throw new JAXRPCServletException(
"error.implementorFactory.newInstanceFailed",
((RuntimeEndpointInfo) targetEndpoint).getName());
} catch (InstantiationException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
throw new JAXRPCServletException(
"error.implementorFactory.newInstanceFailed",
((RuntimeEndpointInfo) targetEndpoint).getName());
} catch (ServiceException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
throw new JAXRPCServletException(
"error.implementorFactory.newInstanceFailed",
((RuntimeEndpointInfo) targetEndpoint).getName());
} catch (JAXRPCServletException e) {
throw e;
} catch (JAXRPCException e) {
logger.log(Level.SEVERE, e.getMessage(), e);
throw new JAXRPCServletException(
"error.implementorFactory.servantInitFailed",
((RuntimeEndpointInfo) targetEndpoint).getName());
}
}
public void releaseImplementor(
RuntimeEndpointInfo targetEndpoint,
Implementor implementor) {
// this seems overly defensive now; given the current implementation
// of getImplementorFor(), the implementor cache will be monotonic
boolean mustDestroy = false;
synchronized (this) {
Implementor cachedImplementor =
(Implementor) cachedImplementors.get(targetEndpoint);
if (cachedImplementor != implementor) {
mustDestroy = true;
}
}
if (mustDestroy) {
preImplementorDestroy(implementor);
implementor.destroy();
}
}
public void destroy() {
// this "if" is there because if the server configuration was null,
// init() was not called, so we shouldn't call destroy either
if (servletConfig != null) {
for (Iterator iter = cachedImplementors.values().iterator();
iter.hasNext();
) {
Implementor implementor = (Implementor) iter.next();
preImplementorDestroy(implementor);
implementor.destroy();
}
}
try {
cachedImplementors.clear();
} catch (UnsupportedOperationException e) {
}
}
protected void postImplementorInit(
Implementor implementor,
RuntimeEndpointInfo targetEndpoint) {
}
protected void preImplementorDestroy(Implementor implementor) {
}
private ServletConfig servletConfig;
private ServletContext servletContext;
private Map cachedImplementors = new HashMap();
private static final Logger logger =
Logger.getLogger(
com.sun.xml.rpc.util.Constants.LoggingDomain + ".server.http");
}