org.glassfish.jersey.servlet.internal.ThreadLocalInvoker Maven / Gradle / Ivy
/*
* Copyright (c) 2010, 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 org.glassfish.jersey.servlet.internal;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* A proxy invocation handler that delegates all methods to a thread local instance.
*
* @author Paul Sandoz
*/
public class ThreadLocalInvoker implements InvocationHandler {
private ThreadLocal threadLocalInstance = new ThreadLocal<>();
public void set(final T threadLocalInstance) {
this.threadLocalInstance.set(threadLocalInstance);
}
public T get() {
return this.threadLocalInstance.get();
}
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
if (threadLocalInstance.get() == null) {
throw new IllegalStateException(LocalizationMessages.PERSISTENCE_UNIT_NOT_CONFIGURED(proxy.getClass()));
}
try {
return method.invoke(threadLocalInstance.get(), args);
} catch (final IllegalAccessException ex) {
throw new IllegalStateException(ex);
} catch (final InvocationTargetException ex) {
throw ex.getTargetException();
}
}
}