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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.asdctool.servlets;
import com.thinkaurelius.titan.core.TitanGraph;
import org.apache.commons.configuration.BaseConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.tinkerpop.gremlin.structure.io.graphml.GraphMLWriter;
import org.glassfish.jersey.media.multipart.FormDataParam;
import org.openecomp.sdc.asdctool.Utils;
import org.openecomp.sdc.common.log.wrappers.Logger;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.*;
import java.util.Map.Entry;
import java.util.Properties;
//import com.tinkerpop.blueprints.util.io.graphml.GraphMLWriter;
@Path("/titan")
public class ExportImportTitanServlet {
private static Logger log = Logger.getLogger(ExportImportTitanServlet.class.getName());
@GET
@Path("export")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_OCTET_STREAM)
public Response export(@FormDataParam("titanProperties") File titanPropertiesFile,
@FormDataParam("metadata") String exportGraphMetadata) {
printTitanConfigFile(titanPropertiesFile);
printMetadata(exportGraphMetadata);
Properties titanProperties = convertFileToProperties(titanPropertiesFile);
if (titanProperties == null) {
Response response = Utils.buildOkResponse(400, "cannot parse titan properties file", null);
return response;
}
Configuration conf = new BaseConfiguration();
for (Entry<Object, Object> entry : titanProperties.entrySet()) {
String key = entry.getKey().toString();
Object value = entry.getValue();
conf.setProperty(key, value);
}
conf.setProperty("storage.machine-id-appendix", System.currentTimeMillis() % 1000);
TitanGraph openGraph = Utils.openGraph(conf);
if (openGraph == null) {
Response buildErrorResponse = Utils.buildOkResponse(500, "failed to open graph", null);
return buildErrorResponse;
}
// Open Titan Graph
Response buildOkResponse = Utils.buildOkResponse(200, "ok man", null);
return buildOkResponse;
}
private Properties convertFileToProperties(File titanPropertiesFile) {
Properties properties = new Properties();
FileReader fileReader = null;
try {
fileReader = new FileReader(titanPropertiesFile);
properties.load(fileReader);
} catch (Exception e) {
log.error("Failed to convert file to properties", e);
return null;
} finally {
if (fileReader != null) {
try {
fileReader.close();
} catch (IOException e) {
log.error("Failed to close file", e);
}
}
}
return properties;
}
private void printTitanConfigFile(File titanPropertiesFile) {
if (log.isDebugEnabled()) {
StringBuilder builder = new StringBuilder();
try (BufferedReader br = new BufferedReader(new FileReader(titanPropertiesFile))) {
String line;
while ((line = br.readLine()) != null) {
builder.append(line + Utils.NEW_LINE);
}
log.debug(builder.toString());
} catch (IOException e) {
log.error("Cannot print titan properties file", e);
}
}
}
private void printMetadata(String exportGraphMetadata) {
log.debug(exportGraphMetadata);
}
public String exportGraph(TitanGraph graph, String outputDirectory) {
String result = null;
// GraphMLWriter graphMLWriter = new GraphMLWriter(graph);
GraphMLWriter graphMLWriter = GraphMLWriter.build().create();
String outputFile = outputDirectory + File.separator + "exportGraph." + System.currentTimeMillis() + ".ml";
OutputStream out = null;
try {
out = new BufferedOutputStream(new ByteArrayOutputStream());
// graphMLWriter.outputGraph(out);
graphMLWriter.writeGraph(out, graph);
// graph.commit();
graph.tx().commit();
result = outputFile;
} catch (Exception e) {
log.info("export Graph failed - {}" , e);
// graph.rollback();
graph.tx().rollback();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
log.info("close FileOutputStream failed - {}" , e);
}
}
return result;
}
}
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