/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.apache.aries.blueprint.plugin.handlers.spring;
import com.google.common.base.CaseFormat;
import org.apache.aries.blueprint.plugin.spi.BeanAnnotationHandler;
import org.apache.aries.blueprint.plugin.spi.BeanEnricher;
import org.apache.aries.blueprint.plugin.spi.BlueprintConfiguration;
import org.apache.aries.blueprint.plugin.spi.ContextEnricher;
import org.apache.aries.blueprint.plugin.spi.MethodAnnotationHandler;
import org.apache.aries.blueprint.plugin.spi.XmlWriter;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Set;
public class SpringTransactionalFactory implements BeanAnnotationHandler<Transactional>, MethodAnnotationHandler<Transactional> {
private static final String PATTERN_NS_TX1 = "http\\:\\/\\/aries\\.apache\\.org\\/xmlns\\/transactions\\/v1\\.(.)\\.(.)";
private static final String PATTERN_NS_TX2 = "http\\:\\/\\/aries\\.apache\\.org\\/xmlns\\/transactions\\/v2\\.(.)\\.(.)";
private static final String NS_TX_1_2_0 = "http://aries.apache.org/xmlns/transactions/v1.2.0";
private static final String ENABLE_ANNOTATION = "transaction.enableAnnotation";
private String getTransactionTypeName(Transactional transactional) {
Propagation propagation = transactional.propagation();
if (propagation == Propagation.NESTED) {
throw new UnsupportedOperationException("Nested transactions not supported");
}
return CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, propagation.name());
}
@Override
public Class<Transactional> getAnnotation() {
return Transactional.class;
}
@Override
public void handleMethodAnnotation(Class<?> clazz, List<Method> methods, ContextEnricher contextEnricher, BeanEnricher beanEnricher) {
final String nsTx1 = getNamespaceByPattern(contextEnricher.getBlueprintConfiguration().getNamespaces(), PATTERN_NS_TX1);
if (nsTx1 != null) {
enableAnnotationTx1(contextEnricher, nsTx1);
for (final Method method : methods) {
final Transactional transactional = method.getAnnotation(Transactional.class);
final String transactionTypeName = getTransactionTypeName(transactional);
final String name = method.getName();
beanEnricher.addBeanContentWriter("javax.transactional.method/" + clazz.getName() + "/" + name + "/" + transactionTypeName, new XmlWriter() {
@Override
public void write(XMLStreamWriter writer) throws XMLStreamException {
writer.writeEmptyElement("transaction");
writer.writeDefaultNamespace(nsTx1);
writer.writeAttribute("method", name);
writer.writeAttribute("value", transactionTypeName);
}
});
}
}
final String nsTx2 = getNamespaceByPattern(contextEnricher.getBlueprintConfiguration().getNamespaces(), PATTERN_NS_TX2);
if (nsTx2 != null) {
insertEnableAnnotationTx2(contextEnricher, nsTx2);
}
}
@Override
public void handleBeanAnnotation(AnnotatedElement annotatedElement, String id, ContextEnricher contextEnricher, BeanEnricher beanEnricher) {
final String nsTx1 = getNamespaceByPattern(contextEnricher.getBlueprintConfiguration().getNamespaces(), PATTERN_NS_TX1);
if (nsTx1 != null) {
enableAnnotationTx1(contextEnricher, nsTx1);
final Transactional transactional = annotatedElement.getAnnotation(Transactional.class);
final String transactionTypeName = getTransactionTypeName(transactional);
beanEnricher.addBeanContentWriter("javax.transactional.method/" + annotatedElement + "/*/" + transactionTypeName, new XmlWriter() {
@Override
public void write(XMLStreamWriter writer) throws XMLStreamException {
writer.writeEmptyElement("transaction");
writer.writeDefaultNamespace(nsTx1);
writer.writeAttribute("method", "*");
writer.writeAttribute("value", transactionTypeName);
}
});
}
final String nsTx2 = getNamespaceByPattern(contextEnricher.getBlueprintConfiguration().getNamespaces(), PATTERN_NS_TX1);
if (nsTx2 != null) {
insertEnableAnnotationTx2(contextEnricher, nsTx2);
}
}
private String getNamespaceByPattern(Set<String> namespaces, String pattern) {
for (String namespace : namespaces) {
if (namespace.matches(pattern)) {
return namespace;
}
}
return null;
}
private void enableAnnotationTx1(ContextEnricher contextEnricher, final String nsTx1) {
// TX1 enable-annotation are valid only in 1.2.0 schema
if (NS_TX_1_2_0.equals(nsTx1) && getEnableAnnotationConfig(contextEnricher.getBlueprintConfiguration())) {
insertEnableAnnotationTx1(contextEnricher, nsTx1);
}
}
private boolean getEnableAnnotationConfig(BlueprintConfiguration blueprintConfig) {
String enableAnnotation = blueprintConfig.getCustomParameters().get(ENABLE_ANNOTATION);
return enableAnnotation == null || Boolean.parseBoolean(enableAnnotation);
}
private void insertEnableAnnotationTx1(ContextEnricher contextEnricher, final String namespace) {
contextEnricher.addBlueprintContentWriter("transaction/ennable-annotation", new XmlWriter() {
@Override
public void write(XMLStreamWriter writer) throws XMLStreamException {
writer.writeEmptyElement("enable-annotations");
writer.writeDefaultNamespace(namespace);
}
});
}
private void insertEnableAnnotationTx2(ContextEnricher contextEnricher, final String namespace) {
contextEnricher.addBlueprintContentWriter("transaction/ennable-annotation", new XmlWriter() {
@Override
public void write(XMLStreamWriter writer) throws XMLStreamException {
writer.writeEmptyElement("enable");
writer.writeDefaultNamespace(namespace);
}
});
}
}