/*
* 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
*
* 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.wso2.carbon.rulecep.adapters.service.internal;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.impl.builder.StAXOMBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.component.ComponentContext;
import org.wso2.carbon.rulecep.adapters.service.InputOutputAdaptersConfigurationFactory;
import org.wso2.carbon.rulecep.adapters.service.InputOutputAdaptersService;
import org.wso2.carbon.rulecep.adapters.service.InputOutputAdaptersServiceImpl;
import org.wso2.carbon.rulecep.commons.LoggedRuntimeException;
import org.wso2.carbon.rulecep.commons.descriptions.AXIOMXPathFactory;
import org.wso2.carbon.utils.ServerConstants;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.*;
/**
* @scr.component name="inputoutputadapters.component" immediate="true"
*/
public class InputOutputAdaptersComponent {
private static final Log log = LogFactory.getLog(InputOutputAdaptersComponent.class);
private ServiceRegistration serviceRegistration;
private static final String COMPONENT_CONF = "adapters-component.conf";
protected void activate(ComponentContext componentContext) {
if (log.isDebugEnabled()) {
log.debug("Starting the InputOutputAdapters Component ");
}
OMElement config = loadConfigXML();
InputOutputAdaptersService service = new InputOutputAdaptersServiceImpl(
InputOutputAdaptersConfigurationFactory.create(config,
new AXIOMXPathFactory()));
serviceRegistration = componentContext.getBundleContext().registerService(
InputOutputAdaptersService.class.getName(),
service,
null);
}
protected void deactivate(ComponentContext componentContext) {
if (log.isDebugEnabled()) {
log.debug("Stopping the InputOutputAdapters Component");
}
componentContext.getBundleContext().ungetService(serviceRegistration.getReference());
}
/**
* Helper method to load the event config
*
* @return OMElement representation of the event config
*/
private OMElement loadConfigXML() {
String carbonHome = System.getProperty(ServerConstants.CARBON_CONFIG_DIR_PATH);
String path = carbonHome + File.separator + COMPONENT_CONF;
BufferedInputStream inputStream = null;
try {
File file = new File(path);
if (!file.exists()) {
log.info("There is no " + COMPONENT_CONF + ".. Using the default configuration");
inputStream = new BufferedInputStream(
new ByteArrayInputStream("<InputOutputManager/>".getBytes()));
} else {
inputStream = new BufferedInputStream(new FileInputStream(file));
}
XMLStreamReader parser = XMLInputFactory.newInstance().
createXMLStreamReader(inputStream);
StAXOMBuilder builder = new StAXOMBuilder(parser);
return builder.getDocumentElement();
} catch (FileNotFoundException e) {
throw new LoggedRuntimeException(COMPONENT_CONF + "cannot be found in" +
" the path : " + path,
e, log);
} catch (XMLStreamException e) {
throw new LoggedRuntimeException("Invalid XML for " + COMPONENT_CONF + " located in" +
" the path : " +
path, e, log);
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (IOException ingored) {
}
}
}
}