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merge #231 - [ARTEMIS-294] Use doPriviledged block for ServiceLoader

This commit is contained in:
Andy Taylor 2015-11-04 11:50:55 +00:00
parent 8f1848108a 7d6a6de8dd
commit 95a8570deb
3 changed files with 47 additions and 45 deletions
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55
artemis-service-extensions/src/main/java/org/apache/activemq/artemis/service/extensions/ServiceUtils.java
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@ -16,12 +16,15 @@
*/
package org.apache.activemq.artemis.service.extensions;
import javax.transaction.TransactionManager;
import javax.transaction.xa.XAResource;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
import javax.transaction.TransactionManager;
import javax.transaction.xa.XAResource;
import org.apache.activemq.artemis.service.extensions.transactions.TransactionManagerLocator;
import org.apache.activemq.artemis.service.extensions.xa.ActiveMQXAResourceWrapper;
import org.apache.activemq.artemis.service.extensions.xa.ActiveMQXAResourceWrapperFactory;
@ -37,7 +40,7 @@ public class ServiceUtils {
private static ActiveMQXAResourceWrapperFactory getActiveMQXAResourceWrapperFactory() {
if (activeMQXAResourceWrapperFactory == null) {
setActiveMQXAResourceWrapperFactory(ServiceLoader.load(ActiveMQXAResourceWrapperFactory.class));
activeMQXAResourceWrapperFactory = findActiveMQXAResourceWrapperFactory();
}
return activeMQXAResourceWrapperFactory;
}
@ -48,11 +51,7 @@ public class ServiceUtils {
public static synchronized TransactionManager getTransactionManager() {
if (!transactionManagerLoaded) {
Iterator<TransactionManagerLocator> it = ServiceLoader.load(TransactionManagerLocator.class).iterator();
while (it.hasNext() && transactionManager == null) {
transactionManager = it.next().getTransactionManager();
}
transactionManager = findTransactionManager();
if (transactionManager != null) {
transactionManagerLoaded = true;
}
@ -68,13 +67,39 @@ public class ServiceUtils {
transactionManagerLoaded = (transactionManager != null);
}
private static void setActiveMQXAResourceWrapperFactory(Iterable<ActiveMQXAResourceWrapperFactory> iterable) {
if (iterable.iterator().hasNext()) {
activeMQXAResourceWrapperFactory = iterable.iterator().next();
}
else {
activeMQXAResourceWrapperFactory = new ActiveMQXAResourceWrapperFactoryImpl();
}
/**
* Find the <em>first</em> transaction manager loaded from the {@code TransactionManagerLocator} service or {@code null} if none is loaded.
*/
private static TransactionManager findTransactionManager() {
return AccessController.doPrivileged(new PrivilegedAction<TransactionManager>() {
@Override
public TransactionManager run() {
Iterator<TransactionManagerLocator> it = ServiceLoader.load(TransactionManagerLocator.class, ServiceUtils.class.getClassLoader()).iterator();
while (it.hasNext() && transactionManager == null) {
transactionManager = it.next().getTransactionManager();
}
return transactionManager;
}
});
}
/**
* Find the <em>first</em> wrapper factory loaded from the {@code ActiveMQXAResourceWrapperFactory} service or
* use the default {@code ActiveMQXAResourceWrapperFactoryImpl} if none is loaded.
*/
private static ActiveMQXAResourceWrapperFactory findActiveMQXAResourceWrapperFactory() {
return AccessController.doPrivileged(new PrivilegedAction<ActiveMQXAResourceWrapperFactory>() {
@Override
public ActiveMQXAResourceWrapperFactory run() {
Iterator<ActiveMQXAResourceWrapperFactory> iterator = ServiceLoader.load(ActiveMQXAResourceWrapperFactory.class, ServiceUtils.class.getClassLoader()).iterator();
if (iterator.hasNext()) {
return iterator.next();
}
else {
return new ActiveMQXAResourceWrapperFactoryImpl();
}
}
});
}
}

36
artemis-service-extensions/src/test/java/org/apache/activemq/artemis/service/extensions/tests/xa/ServiceUtilsTest.java
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@ -16,44 +16,20 @@
*/
package org.apache.activemq.artemis.service.extensions.tests.xa;
import java.lang.reflect.Field;
import static org.jgroups.util.Util.assertTrue;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.apache.activemq.artemis.service.extensions.ServiceUtils;
import org.apache.activemq.artemis.service.extensions.xa.ActiveMQXAResourceWrapperFactory;
import org.apache.activemq.artemis.service.extensions.xa.ActiveMQXAResourceWrapperFactoryImpl;
import org.junit.Test;
import static org.jgroups.util.Util.assertTrue;
public class ServiceUtilsTest {
@Test
public void testSetActiveMQXAResourceWrapperFactorySetsDefaultImplWhenNoOther() throws Exception {
List<ActiveMQXAResourceWrapperFactory> factories = new ArrayList<ActiveMQXAResourceWrapperFactory>();
Method method = ServiceUtils.class.getDeclaredMethod("setActiveMQXAResourceWrapperFactory", Iterable.class);
public void testGetActiveMQXAResourceWrapperFactoryLoadsService() throws Exception {
Method method = ServiceUtils.class.getDeclaredMethod("getActiveMQXAResourceWrapperFactory");
method.setAccessible(true);
method.invoke(null, factories);
Field field = ServiceUtils.class.getDeclaredField("activeMQXAResourceWrapperFactory");
field.setAccessible(true);
assertTrue(field.get(null) instanceof ActiveMQXAResourceWrapperFactoryImpl);
}
@Test
public void testSetActiveMQXAResourceWrapperFactorySetsExtensionImplWhenSupplied() throws Exception {
List<ActiveMQXAResourceWrapperFactory> factories = new ArrayList<ActiveMQXAResourceWrapperFactory>();
factories.add(new MockActiveMQResourceWrapperFactory());
Method method = ServiceUtils.class.getDeclaredMethod("setActiveMQXAResourceWrapperFactory", Iterable.class);
method.setAccessible(true);
method.invoke(null, factories);
Field field = ServiceUtils.class.getDeclaredField("activeMQXAResourceWrapperFactory");
field.setAccessible(true);
assertTrue(field.get(null) instanceof MockActiveMQResourceWrapperFactory);
Object o = method.invoke(null);
assertTrue(o instanceof MockActiveMQResourceWrapperFactory);
}
}

1
artemis-service-extensions/src/test/resources/META-INF/services/org.apache.activemq.artemis.service.extensions.xa.ActiveMQXAResourceWrapperFactory Normal file
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@ -0,0 +1 @@
org.apache.activemq.artemis.service.extensions.tests.xa.MockActiveMQResourceWrapperFactory