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Client library for EJB applications working against Wildfly - Java EE Variant
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.jboss.ejb.client;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.net.SocketAddress;
import java.net.URI;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import java.util.function.UnaryOperator;
import jakarta.ejb.CreateException;
import jakarta.transaction.UserTransaction;
import org.jboss.ejb._private.Logs;
import org.wildfly.common.Assert;
import org.wildfly.naming.client.NamingProvider;
import org.wildfly.security.auth.client.AuthenticationContext;
import org.wildfly.transaction.client.RemoteTransactionContext;
/**
* The main Enterprise Beans client API class. This class contains helper methods which may be used to create proxies, open sessions,
* and associate the current invocation context.
*
* @author jpai
* @author David M. Lloyd
*/
public final class EJBClient {
private static final Logs log = Logs.MAIN;
static {
log.greeting(Version.getVersionString());
}
private EJBClient() {
}
private static final ThreadLocal> FUTURE_RESULT = new ThreadLocal>();
/**
* An invocation context key which is set to the source socket address of the invocation request, if any. The
* value will be of type {@link SocketAddress}.
*/
public static final String SOURCE_ADDRESS_KEY = "jboss.source-address";
/**
* A JNDI context key which, if defined, identifies that the proxy to be created should have affinity to the cluster.
*/
public static final String CLUSTER_AFFINITY = "jboss.cluster-affinity";
/**
* A JNDI context key which, if defined, disables learning in the case of an unspecified {@link EJBClient#CLUSTER_AFFINITY}
*/
public static final String DISABLE_AFFINITY_LEARNING = "jboss.disable-affinity-learning";
/**
* Get an asynchronous view of a proxy. Any {@code void} method on the proxy will be invoked fully asynchronously
* without a server round-trip delay. Any method which returns a {@link java.util.concurrent.Future Future} will
* continue to be asynchronous. Any other method invoked on the returned proxy will return {@code null} (the future
* result can be acquired by wrapping the remote call with {@link #getFutureResult(Object)} or by using {@link #getFutureResult()}).
* If an asynchronous view is passed in, the same view is returned.
*
* @param proxy the proxy interface instance
* @param the proxy type
* @return the asynchronous view
* @throws IllegalArgumentException if the given object is not a valid proxy
*/
@SuppressWarnings("unchecked")
public static T asynchronous(final T proxy) throws IllegalArgumentException {
final InvocationHandler invocationHandler = Proxy.getInvocationHandler(proxy);
if (invocationHandler instanceof EJBInvocationHandler) {
final EJBInvocationHandler remoteInvocationHandler = (EJBInvocationHandler) invocationHandler;
// determine proxy "type", return existing instance if it's already async
if (remoteInvocationHandler.isAsyncHandler()) {
return proxy;
} else {
return (T) Proxy.newProxyInstance(proxy.getClass().getClassLoader(), proxy.getClass().getInterfaces(), remoteInvocationHandler.getAsyncHandler());
}
} else {
throw log.unknownProxy(proxy);
}
}
/**
* Get the future result of an operation. Should be called in conjunction with {@link #asynchronous(Object)}.
*
* @param operation the operation
* @param the result type
* @return the future result
* @throws IllegalStateException if the operation is not appropriately given
*/
@SuppressWarnings("unchecked")
public static Future getFutureResult(final T operation) throws IllegalStateException {
if (operation != null) {
return new FinishedFuture(operation);
}
final ThreadLocal> futureResult = FUTURE_RESULT;
try {
final Future future = futureResult.get();
if (future == null) throw log.noAsyncInProgress();
return (Future) future;
} finally {
futureResult.remove();
}
}
/**
* Get the future result of an operation. Should be called in conjunction with {@link #asynchronous(Object)}.
*
* @return the future result
* @throws IllegalStateException if the operation is not appropriately given
*/
public static Future getFutureResult() throws IllegalStateException {
final ThreadLocal> futureResult = FUTURE_RESULT;
try {
final Future future = futureResult.get();
if (future == null) throw log.noAsyncInProgress();
return future;
} finally {
futureResult.remove();
}
}
static void setFutureResult(final Future future) {
FUTURE_RESULT.set(future);
}
/**
* Create a new proxy for the remote object identified by the given locator.
*
* @param locator the locator
* @param the proxy type
* @return the new proxy
* @throws IllegalArgumentException if the locator parameter is {@code null} or is invalid
*/
public static T createProxy(final EJBLocator locator) throws IllegalArgumentException {
return createProxy(locator, null);
}
static T createProxy(final EJBLocator locator, final Supplier authenticationContextSupplier) {
Assert.checkNotNullParam("locator", locator);
return locator.createProxyInstance(new EJBInvocationHandler(locator, authenticationContextSupplier));
}
/**
* Determine whether an object is indeed a valid Enterprise Bean proxy object created by this API.
*
* @param object the object to test
* @return {@code true} if it is an Enterprise Bean proxy, {@code false} otherwise
*/
public static boolean isEJBProxy(final Object object) {
return object != null && Proxy.isProxyClass(object.getClass()) && Proxy.getInvocationHandler(object) instanceof EJBInvocationHandler;
}
/**
* Create a new Enterprise Bean session proxy. The returned proxy will be cluster-aware if a cluster affinity is used in the locator.
*
* @param statelessLocator the stateless locator identifying the stateful Enterprise Beans
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static T createSessionProxy(final StatelessEJBLocator statelessLocator) throws Exception {
return createSessionProxy(statelessLocator, null, null);
}
// Special hook method for naming; let's replace this sometime soon.
static T createSessionProxy(final StatelessEJBLocator statelessLocator, Supplier authenticationContextSupplier, NamingProvider namingProvider) throws Exception {
final EJBClientContext clientContext = EJBClientContext.getCurrent();
// this is the auth context to use just for the invocation
final AuthenticationContext authenticationContext;
if (authenticationContextSupplier != null) {
authenticationContext = authenticationContextSupplier.get();
} else {
authenticationContext = AuthenticationContext.captureCurrent();
}
final EJBSessionCreationInvocationContext context = clientContext.createSessionCreationInvocationContext(statelessLocator, authenticationContext);
final StatefulEJBLocator statefulLocator = clientContext.createSession(context, statelessLocator, namingProvider);
final T proxy = createProxy(statefulLocator, authenticationContextSupplier);
final Affinity weakAffinity = context.getWeakAffinity();
if (Logs.INVOCATION.isDebugEnabled()) {
Logs.INVOCATION.debugf("createSessionProxy: strong affinity = %s, weak affinity = %s", statefulLocator.getAffinity(), context.getWeakAffinity());
}
if (weakAffinity != null && Affinity.NONE != weakAffinity) {
setWeakAffinity(proxy, weakAffinity);
}
return proxy;
}
/**
* Create a new Enterprise Bean session.
*
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param distinctName the module distinct name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final Class viewType, final String appName, final String moduleName, final String beanName, final String distinctName) throws Exception {
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, distinctName, Affinity.NONE));
}
/**
* Create a new Enterprise Bean session.
*
* @param affinity the affinity specification for the session
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param distinctName the module distinct name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final Affinity affinity, final Class viewType, final String appName, final String moduleName, final String beanName, final String distinctName) throws Exception {
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, distinctName, affinity == null ? Affinity.NONE : affinity));
}
/**
* Create a new Enterprise Bean session.
*
* @param uri a URI at which Enterprise Beans may be obtained
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param distinctName the module distinct name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final URI uri, final Class viewType, final String appName, final String moduleName, final String beanName, final String distinctName) throws Exception {
final Affinity affinity = uri == null ? Affinity.NONE : Affinity.forUri(uri);
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, distinctName, affinity));
}
/**
* Create a new Enterprise Bean session.
*
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final Class viewType, final String appName, final String moduleName, final String beanName) throws Exception {
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, Affinity.NONE));
}
/**
* Create a new Enterprise Bean session.
*
* @param affinity the affinity specification for the session
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final Affinity affinity, final Class viewType, final String appName, final String moduleName, final String beanName) throws Exception {
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, affinity == null ? Affinity.NONE : affinity));
}
/**
* Create a new Enterprise Bean session.
*
* @param uri a URI at which Enterprise Beans may be obtained
* @param viewType the view type class
* @param appName the application name
* @param moduleName the module name
* @param beanName the Enterprise Beans name
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(final URI uri, final Class viewType, final String appName, final String moduleName, final String beanName) throws Exception {
final Affinity affinity = uri == null ? Affinity.NONE : Affinity.forUri(uri);
return createSession(new StatelessEJBLocator(viewType, appName, moduleName, beanName, affinity));
}
/**
* Create a new Enterprise Bean session.
*
* @param statelessLocator the stateless locator identifying the stateful Enterprise Beans
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
public static StatefulEJBLocator createSession(StatelessEJBLocator statelessLocator) throws Exception {
return createSession(statelessLocator, null);
}
/**
* Create a new Enterprise Bean session.
*
* @param statelessLocator the stateless locator identifying the stateful Enterprise Beans
* @param authenticationContext the authentication context to use for the request and the resultant proxy
* @param the view type
* @return the new Enterprise Beans locator
* @throws CreateException if an error occurs
*/
static StatefulEJBLocator createSession(StatelessEJBLocator statelessLocator, AuthenticationContext authenticationContext) throws Exception {
final EJBClientContext clientContext = EJBClientContext.getCurrent();
return clientContext.createSession(statelessLocator, authenticationContext, null);
}
/**
* Perform a one-way asynchronous invocation by method locator on a proxy. Any return value is ignored.
*
* @param proxy the Enterprise Beans proxy
* @param methodLocator the method locator
* @param args the invocation arguments
* @param the view type
* @throws Exception if the invocation failed for some reason
*/
public static void invokeOneWay(T proxy, EJBMethodLocator methodLocator, Object... args) throws Exception {
final EJBInvocationHandler invocationHandler = EJBInvocationHandler.forProxy(proxy);
final EJBProxyInformation.ProxyMethodInfo proxyMethodInfo = invocationHandler.getProxyMethodInfo(methodLocator);
invocationHandler.invoke(proxy, proxyMethodInfo, args);
}
/**
* Perform an asynchronous invocation by method locator on a proxy, returning the future result.
*
* @param proxy the Enterprise Beans proxy
* @param methodLocator the method locator
* @param args the invocation arguments
* @param the view type
* @throws Exception if the invocation failed for some reason
*/
public static Future invokeAsync(T proxy, EJBMethodLocator methodLocator, Object... args) throws Exception {
final EJBInvocationHandler invocationHandler = EJBInvocationHandler.forProxy(proxy);
final EJBProxyInformation.ProxyMethodInfo proxyMethodInfo = invocationHandler.getProxyMethodInfo(methodLocator);
return (Future) invocationHandler.invoke(proxy, proxyMethodInfo, args);
}
/**
* Perform an invocation by method locator on a proxy, returning the result.
*
* @param proxy the Enterprise Beans proxy
* @param methodLocator the method locator
* @param args the invocation arguments
* @param the view type
* @throws Exception if the invocation failed for some reason
*/
public static Object invoke(T proxy, EJBMethodLocator methodLocator, Object... args) throws Exception {
final EJBInvocationHandler invocationHandler = EJBInvocationHandler.forProxy(proxy);
final EJBProxyInformation.ProxyMethodInfo proxyMethodInfo = invocationHandler.getProxyMethodInfo(methodLocator);
return invocationHandler.invoke(proxy, proxyMethodInfo, args);
}
/**
* Get the locator for a proxy, if it has one.
*
* @param proxy the proxy (may not be {@code null})
* @param the proxy type
* @return the locator
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
*/
public static EJBLocator getLocatorFor(T proxy) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
return EJBInvocationHandler.forProxy(proxy).getLocator();
}
/**
* Set a per-proxy invocation timeout. This overrides the globally configured timeout.
*
* @param proxy the proxy to change (must not be {@code null}, must be a valid Enterprise Bean proxy)
* @param timeout the amount of time (must be greater than zero)
* @param timeUnit the time unit (must not be {@code null})
* @throws IllegalArgumentException if the timeout is less than or equal to zero or a required parameter is
* {@code null} or invalid
*/
public static void setInvocationTimeout(Object proxy, long timeout, TimeUnit timeUnit) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkMinimumParameter("timeout", 1L, timeout);
Assert.checkNotNullParam("timeUnit", timeUnit);
EJBInvocationHandler.forProxy(proxy).setInvocationTimeout(Math.max(1L, timeUnit.toMillis(timeout)));
}
/**
* Clear the per-proxy invocation timeout, causing it to use the globally configured timeout.
*
* @param proxy the proxy to change (must not be {@code null}, must be a valid Enterprise Bean proxy)
* @throws IllegalArgumentException if the proxy is {@code null} or is not valid
*/
public static void clearInvocationTimeout(Object proxy) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
EJBInvocationHandler.forProxy(proxy).setInvocationTimeout(-1L);
}
/**
* Change the strong affinity of a proxy. All subsequent invocations against the proxy will use the new affinity.
* Subsequent calls to {@link #getLocatorFor(Object)} for the given proxy will return the updated locator.
*
* @param proxy the proxy (may not be {@code null})
* @param newAffinity the new affinity (may not be {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
* @throws SecurityException if a security manager is present and the caller does not have the {@code changeStrongAffinity} {@link EJBClientPermission}
*/
public static void setStrongAffinity(Object proxy, Affinity newAffinity) throws IllegalArgumentException, SecurityException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("newAffinity", newAffinity);
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(EJBClientPermission.CHANGE_STRONG_AFFINITY);
}
EJBInvocationHandler.forProxy(proxy).setStrongAffinity(newAffinity);
}
/**
* Get the strong affinity of a proxy. This is a shortcut for {@code getLocatorFor(proxy).getAffinity()}.
*
* @param proxy the proxy (may not be {@code null})
* @return the proxy strong affinity
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
*/
public static Affinity getStrongAffinity(Object proxy) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
return getLocatorFor(proxy).getAffinity();
}
/**
* Compare and change the strong affinity of a proxy. All subsequent invocations against the proxy will use the new affinity.
* Subsequent calls to {@link #getLocatorFor(Object)} for the given proxy will return the updated locator. If the
* affinity is not equal to the expected value, {@code false} is returned and no change is made.
*
* @param proxy the proxy (may not be {@code null})
* @param newAffinity the new affinity (may not be {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
* @throws SecurityException if a security manager is present and the caller does not have the {@code changeStrongAffinity} {@link EJBClientPermission}
*/
public static boolean compareAndSetStrongAffinity(Object proxy, Affinity expectedAffinity, Affinity newAffinity) throws IllegalArgumentException, SecurityException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("expectedAffinity", expectedAffinity);
Assert.checkNotNullParam("newAffinity", newAffinity);
final EJBInvocationHandler invocationHandler = EJBInvocationHandler.forProxy(proxy);
final Affinity existing = invocationHandler.getLocator().getAffinity();
if (! expectedAffinity.equals(existing)) {
return false;
}
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(EJBClientPermission.CHANGE_STRONG_AFFINITY);
}
return invocationHandler.compareAndSetStrongAffinity(expectedAffinity, newAffinity);
}
/**
* Transform the strong affinity of a proxy. All subsequent invocations against the proxy will use the new affinity.
* Subsequent calls to {@link #getLocatorFor(Object)} for the given proxy will return the updated locator.
*
* @param proxy the proxy (may not be {@code null})
* @param transformOperator the operator to apply to acquire the new affinity from the old one (may not be {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
* @throws SecurityException if a security manager is present and the caller does not have the {@code changeStrongAffinity} {@link EJBClientPermission}
*/
public static void transformStrongAffinity(Object proxy, UnaryOperator transformOperator) throws IllegalArgumentException, SecurityException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("transformOperator", transformOperator);
final EJBInvocationHandler invocationHandler = EJBInvocationHandler.forProxy(proxy);
Affinity oldAffinity = invocationHandler.getLocator().getAffinity();
Affinity newAffinity = transformOperator.apply(oldAffinity);
Assert.assertNotNull(newAffinity);
if (oldAffinity.equals(newAffinity)) {
return;
}
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(EJBClientPermission.CHANGE_STRONG_AFFINITY);
}
while (! invocationHandler.compareAndSetStrongAffinity(oldAffinity, newAffinity)) {
oldAffinity = invocationHandler.getLocator().getAffinity();
newAffinity = transformOperator.apply(oldAffinity);
Assert.assertNotNull(newAffinity);
if (oldAffinity.equals(newAffinity)) {
return;
}
}
}
/**
* Change the weak affinity of a proxy. All subsequent invocations against the proxy will use the new affinity.
*
* @param proxy the proxy (may not be {@code null})
* @param newAffinity the new affinity (may not be {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
* @throws SecurityException if a security manager is present and the caller does not have the {@code changeWeakAffinity} {@link EJBClientPermission}
*/
public static void setWeakAffinity(Object proxy, Affinity newAffinity) throws IllegalArgumentException, SecurityException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("newAffinity", newAffinity);
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(EJBClientPermission.CHANGE_WEAK_AFFINITY);
}
EJBInvocationHandler.forProxy(proxy).setWeakAffinity(newAffinity);
}
/**
* Get the current weak affinity of a proxy.
*
* @param proxy the proxy (must not be {@code null})
* @return the affinity (not {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance
*/
public static Affinity getWeakAffinity(Object proxy) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
return EJBInvocationHandler.forProxy(proxy).getWeakAffinity();
}
/**
* Convert a non-stateful proxy to be stateful. If the proxy was already stateful and the session ID matches, the
* proxy is unchanged. If the proxy was otherwise already stateful, an exception is thrown. Subsequent calls to
* {@link #getLocatorFor(Object)} for the given proxy will return the updated locator.
*
* @param proxy the proxy to convert (must not be {@code null})
* @param sessionID the session ID to use for the stateful locator (must not be {@code null})
* @throws IllegalArgumentException if the given proxy is not a valid client proxy instance, or the proxy is already
* stateful with a different session ID
*/
public static void convertToStateful(Object proxy, SessionID sessionID) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("sessionID", sessionID);
EJBInvocationHandler.forProxy(proxy).setSessionID(sessionID);
}
/**
* Get a {@code UserTransaction} object instance which can be used to control transactions on a specific node.
*
* @param targetNodeName the node name (ignored)
* @return the {@code UserTransaction} instance
* @throws IllegalStateException if the transaction context isn't set or cannot provide a {@code UserTransaction} instance
*/
@Deprecated
@SuppressWarnings("unused")
public static UserTransaction getUserTransaction(String targetNodeName) {
return RemoteTransactionContext.getInstance().getUserTransaction();
}
/**
* Get a proxy attachment.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param the value type
* @return the attachment value or {@code null} if the attachment is not present
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static T getProxyAttachment(Object proxy, AttachmentKey attachmentKey) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
return EJBInvocationHandler.forProxy(proxy).getAttachment(attachmentKey);
}
/**
* Set a proxy attachment.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param newValue the new value to set (must not be {@code null})
* @param the value type
* @return the previous attachment value or {@code null} if the attachment previously did not exist
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static T putProxyAttachment(Object proxy, AttachmentKey attachmentKey, T newValue) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
Assert.checkNotNullParam("newValue", newValue);
return EJBInvocationHandler.forProxy(proxy).putAttachment(attachmentKey, newValue);
}
/**
* Set a proxy attachment if it is not already set.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param newValue the new value to set (must not be {@code null})
* @param the value type
* @return the previous attachment value or {@code null} if the attachment previously did not exist
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static T putProxyAttachmentIfAbsent(Object proxy, AttachmentKey attachmentKey, T newValue) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
Assert.checkNotNullParam("newValue", newValue);
return EJBInvocationHandler.forProxy(proxy).putAttachmentIfAbsent(attachmentKey, newValue);
}
/**
* Remove a proxy attachment.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param the value type
* @return the previous attachment value or {@code null} if the attachment previously did not exist
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static T removeProxyAttachment(Object proxy, AttachmentKey attachmentKey) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
return EJBInvocationHandler.forProxy(proxy).removeAttachment(attachmentKey);
}
/**
* Remove a proxy attachment with a particular value.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param oldValue the new value to set (must not be {@code null})
* @param the value type
* @return {@code true} if the attachment was removed, or {@code false} if the value did not match or was not present
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static boolean removeProxyAttachment(Object proxy, AttachmentKey attachmentKey, T oldValue) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
Assert.checkNotNullParam("oldValue", oldValue);
return EJBInvocationHandler.forProxy(proxy).removeAttachment(attachmentKey, oldValue);
}
/**
* Replace a proxy attachment if it is already present.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param newValue the new value to set (must not be {@code null})
* @param the value type
* @return the previous attachment value or {@code null} if the attachment previously did not exist
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static T replaceProxyAttachment(Object proxy, AttachmentKey attachmentKey, T newValue) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
Assert.checkNotNullParam("newValue", newValue);
return EJBInvocationHandler.forProxy(proxy).replaceAttachment(attachmentKey, newValue);
}
/**
* Replace a proxy attachment if it is already present.
*
* @param proxy the proxy (must not be {@code null})
* @param attachmentKey the attachment key to use (must not be {@code null})
* @param newValue the old value to replace (must not be {@code null})
* @param the value type
* @return {@code true} if the attachment value was replaced, {@code false} otherwise
* @throws IllegalArgumentException if a required parameter is {@code null} or if the object is not a valid EJB client proxy
*/
public static boolean replaceProxyAttachment(Object proxy, AttachmentKey attachmentKey, T oldValue, T newValue) throws IllegalArgumentException {
Assert.checkNotNullParam("proxy", proxy);
Assert.checkNotNullParam("attachmentKey", attachmentKey);
Assert.checkNotNullParam("oldValue", oldValue);
Assert.checkNotNullParam("newValue", newValue);
return EJBInvocationHandler.forProxy(proxy).replaceAttachment(attachmentKey, oldValue, newValue);
}
}
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