/*
* Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.databridge.core.internal.utils;
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.wso2.carbon.databridge.core.conf.DataBridgeConfiguration;
import org.wso2.carbon.databridge.core.exception.DataBridgeConfigurationException;
import org.wso2.carbon.utils.ServerConstants;
import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Helper class to build Agent Server Initial Configurations
*/
public final class DataBridgeCoreBuilder {
private static final Log log = LogFactory.getLog(DataBridgeCoreBuilder.class);
private DataBridgeCoreBuilder() {
}
public static List<String[]> loadStreamDefinitionXML() throws DataBridgeConfigurationException {
List<String[]> streamDefinitionList = new ArrayList<String[]>();
String carbonHome = System.getProperty(ServerConstants.CARBON_CONFIG_DIR_PATH);
String path = carbonHome + File.separator + DataBridgeConstants.DATA_BRIDGE_DIR +
File.separator + DataBridgeConstants.STREAM_DEFINITIONS_XML;
File file = new File(path);
if (file.exists() && !file.isDirectory()) {
OMElement config = loadXML(path, DataBridgeConstants.STREAM_DEFINITIONS_XML);
if (config != null) {
if (!(new QName(DataBridgeConstants.DATA_BRIDGE_NAMESPACE, DataBridgeConstants.STREAM_DEFINITIONS_ELEMENT)).equals(config.getQName())) {
throw new DataBridgeConfigurationException("Wrong configuration added in " + DataBridgeConstants.STREAM_DEFINITIONS_XML);
}
for (Iterator streamDefinitionIterator = config.getChildElements();
streamDefinitionIterator.hasNext(); ) {
OMElement streamDefinition = (OMElement) streamDefinitionIterator.next();
String domainName = streamDefinition.getAttributeValue(new QName(DataBridgeConstants.DOMAIN_NAME_ATTRIBUTE));
if (domainName == null || domainName.equals("")) {
domainName = MultitenantConstants.SUPER_TENANT_DOMAIN_NAME;
}
streamDefinitionList.add(new String[]{domainName, streamDefinition.getText()});
}
}
}
return streamDefinitionList;
}
public static String getDatabridgeConfigPath() {
String carbonHome = System.getProperty(ServerConstants.CARBON_CONFIG_DIR_PATH);
return carbonHome + File.separator + DataBridgeConstants.DATA_BRIDGE_DIR + File.separator + DataBridgeConstants.DATA_BRIDGE_CONFIG_XML;
}
public static OMElement loadXML(String path, String fileName) throws DataBridgeConfigurationException {
BufferedInputStream inputStream = null;
try {
inputStream = new BufferedInputStream(new FileInputStream(new File(path)));
XMLStreamReader parser = XMLInputFactory.newInstance().
createXMLStreamReader(inputStream);
StAXOMBuilder builder = new StAXOMBuilder(parser);
OMElement omElement = builder.getDocumentElement();
omElement.build();
return omElement;
} catch (FileNotFoundException e) {
String errorMessage = fileName
+ " cannot be found in the path : " + path;
log.error(errorMessage, e);
throw new DataBridgeConfigurationException(errorMessage, e);
} catch (XMLStreamException e) {
String errorMessage = "Invalid XML for " + fileName
+ " located in the path : " + path;
log.error(errorMessage, e);
throw new DataBridgeConfigurationException(errorMessage, e);
} finally {
try {
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
String errorMessage = "Can not close the input stream";
log.error(errorMessage, e);
}
}
}
}