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/*
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2022 Payara Foundation and/or its affiliates.
*
* 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.enterprise.concurrent;
import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.Enumeration;
import java.util.Map;
import jakarta.enterprise.concurrent.ContextService;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import jakarta.enterprise.concurrent.ManagedExecutorService;
import org.glassfish.enterprise.concurrent.internal.ContextProxyInvocationHandler;
import org.glassfish.enterprise.concurrent.internal.ManagedCompletableFuture;
import org.glassfish.enterprise.concurrent.spi.ContextSetupProvider;
import org.glassfish.enterprise.concurrent.spi.TransactionSetupProvider;
/**
* Implementation of ContextService interface
*/
public class ContextServiceImpl implements ContextService, Serializable {
static final long serialVersionUID = -386695836029966433L;
protected final ContextSetupProvider contextSetupProvider;
protected final TransactionSetupProvider transactionSetupProvider;
protected final String name;
final private static String INVALID_PROXY =
"contextObject is not a valid contextual object proxy created with the createContextualProxy method";
final private static String NULL_CONTEXTPROPERTIES =
"contextProperties cannot be null";
final private static String NULL_INSTANCE =
"instance cannot be null";
final private static String NO_INTERFACES =
"No interfaces is provided in the method argument";
final private static String CLASS_DOES_NOT_IMPLEMENT_INTERFACES =
"Class does not implement at least one of the provided interfaces";
final private static String DIFFERENT_CONTEXTSERVICE =
"Proxy is created by a different ContextService object";
public ContextServiceImpl(String name, ContextSetupProvider contextSetupProvider) {
this(name, contextSetupProvider, null);
}
public ContextServiceImpl(String name, ContextSetupProvider contextSetupProvider,
TransactionSetupProvider transactionSetupProvider) {
this.name = name;
this.contextSetupProvider = contextSetupProvider;
this.transactionSetupProvider = transactionSetupProvider;
}
public String getName() {
return name;
}
public ContextSetupProvider getContextSetupProvider() {
return contextSetupProvider;
}
public TransactionSetupProvider getTransactionSetupProvider() {
return transactionSetupProvider;
}
@Override
public Object createContextualProxy(Object instance, Class... interfaces) {
return createContextualProxy(instance, null, interfaces);
}
@Override
public Object createContextualProxy(Object instance, Map executionProperties, Class... interfaces) {
if (instance == null) {
throw new IllegalArgumentException(NULL_INSTANCE);
}
if (interfaces == null || interfaces.length == 0) {
throw new IllegalArgumentException(NO_INTERFACES);
}
Class instanceClass = instance.getClass();
for (Class thisInterface: interfaces) {
if (! thisInterface.isAssignableFrom(instanceClass)) {
throw new IllegalArgumentException(CLASS_DOES_NOT_IMPLEMENT_INTERFACES);
}
}
ContextProxyInvocationHandler handler = new ContextProxyInvocationHandler(this, instance, executionProperties);
Object proxy = Proxy.newProxyInstance(instance.getClass().getClassLoader(), interfaces, handler);
return proxy;
}
@Override
public T createContextualProxy(T instance, Class intf) {
return createContextualProxy(instance, null, intf);
}
@Override
public T createContextualProxy(T instance, Map executionProperties, Class intf) {
if (instance == null) {
throw new IllegalArgumentException(NULL_INSTANCE);
}
if (intf == null) {
throw new IllegalArgumentException(NO_INTERFACES);
}
ContextProxyInvocationHandler handler = new ContextProxyInvocationHandler(this, instance, executionProperties);
Object proxy = Proxy.newProxyInstance(instance.getClass().getClassLoader(), new Class[]{intf}, handler);
return (T) proxy;
}
@Override
public Map getExecutionProperties(Object contextObject) {
ContextProxyInvocationHandler handler = verifyHandler(contextObject);
return handler.getExecutionProperties();
}
protected void verifyStringValue(Enumeration e) throws ClassCastException {
while (e.hasMoreElements()) {
String value = (String)e.nextElement();
}
}
protected ContextProxyInvocationHandler verifyHandler(Object contextObject) {
InvocationHandler handler = Proxy.getInvocationHandler(contextObject);
if (handler instanceof ContextProxyInvocationHandler) {
ContextProxyInvocationHandler cpih = (ContextProxyInvocationHandler) handler;
if (cpih.getContextService() != this) {
throw new IllegalArgumentException(DIFFERENT_CONTEXTSERVICE);
}
return cpih;
}
throw new IllegalArgumentException(INVALID_PROXY);
}
@Override
public Callable contextualCallable(Callable clbl) {
return createContextualProxy(clbl, null, Callable.class);
}
@Override
public BiConsumer contextualConsumer(BiConsumer bc) {
return createContextualProxy(bc, null, BiConsumer.class);
}
@Override
public Consumer contextualConsumer(Consumer cnsmr) {
return createContextualProxy(cnsmr, null, Consumer.class);
}
@Override
public BiFunction contextualFunction(BiFunction bf) {
return createContextualProxy(bf, null, BiFunction.class);
}
@Override
public Function contextualFunction(Function fnctn) {
return createContextualProxy(fnctn, null, Function.class);
}
@Override
public Runnable contextualRunnable(Runnable r) {
return createContextualProxy(r, null, Runnable.class);
}
@Override
public Supplier contextualSupplier(Supplier splr) {
return createContextualProxy(splr, null, Supplier.class);
}
@Override
public Executor currentContextExecutor() {
Executor executor = new Executor() {
@Override
public void execute(Runnable command) {
command.run();
}
};
return createContextualProxy(executor, null, Executor.class);
}
@Override
public CompletableFuture withContextCapture(CompletableFuture cf) {
CompletionStage cs = cf;
return (CompletableFuture) withContextCapture(cs);
}
@Override
public CompletionStage withContextCapture(CompletionStage cs) {
ManagedCompletableFuture newCompletableFuture;
Executor executor = getDefaultManageExecutorService();
newCompletableFuture = new ManagedCompletableFuture((ManagedExecutorService) executor);
cs.whenComplete((result, failure) -> {
if(failure == null) {
newCompletableFuture.complete(result);
} else {
newCompletableFuture.completeExceptionally(failure);
}
});
return (CompletionStage) newCompletableFuture;
}
private Executor getDefaultManageExecutorService() {
return new ManagedExecutorServiceImpl(name, null, 0, false,
1, Integer.MAX_VALUE,
0, TimeUnit.SECONDS,
0L,
Integer.MAX_VALUE,
this,
AbstractManagedExecutorService.RejectPolicy.ABORT);
}
}
