/**
* 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.ambari.server.audit;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.apache.ambari.server.audit.request.RequestAuditLogger;
import org.apache.ambari.server.audit.request.RequestAuditLoggerImpl;
import org.apache.ambari.server.audit.request.eventcreator.RequestAuditEventCreator;
import org.apache.ambari.server.cleanup.ClasspathScannerUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.inject.AbstractModule;
import com.google.inject.Scopes;
import com.google.inject.multibindings.Multibinder;
import com.google.inject.name.Names;
public class AuditLoggerModule extends AbstractModule {
private static final Logger LOG = LoggerFactory.getLogger(AuditLoggerModule.class);
/**
* Selectors identifying objects to be bound.
*
* @return a list with interface and annotation types
*/
protected List<Class<?>> getSelectors() {
List<Class<?>> selectorList = new ArrayList<>();
selectorList.add(RequestAuditEventCreator.class);
return selectorList;
}
/**
* Gets the list of types to be excluded from bindings.
*
* @return a list with types to be left out from dynamic bindings
*/
protected List<Class<?>> getExclusions() {
return Collections.emptyList();
}
/**
* Returns the package to be scanned for bindings of this module.
*
* @return the name of the package to be scanned
*/
protected String getPackageToScan() {
return RequestAuditEventCreator.class.getPackage().getName();
}
@Override
protected void configure() {
bind(AuditLogger.class).to(AsyncAuditLogger.class);
// set AuditLoggerDefaultImpl to be used by AsyncAuditLogger
bind(AuditLogger.class).annotatedWith(Names.named(AsyncAuditLogger.InnerLogger)).to(AuditLoggerDefaultImpl.class);
// binding for audit event creators
Multibinder<RequestAuditEventCreator> multiBinder = Multibinder.newSetBinder(binder(), RequestAuditEventCreator.class);
Set<Class<?>> bindingSet = ClasspathScannerUtils.findOnClassPath(getPackageToScan(), getExclusions(), getSelectors());
for (Class clazz : bindingSet) {
LOG.info("Binding audit event creator {}", clazz);
multiBinder.addBinding().to(clazz).in(Scopes.SINGLETON);
}
bind(RequestAuditLogger.class).to(RequestAuditLoggerImpl.class);
}
}