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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.onap.aai.datasnapshot;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import java.util.concurrent.Callable;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.janusgraph.core.JanusGraph;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.logging.ErrorLogHelper;
import org.slf4j.Logger;
public class PartialVertexLoader implements Callable<HashMap<String,String>>{
private Logger LOGGER;
private JanusGraph jg;
private String fName;
private Long vertAddDelayMs;
private Long failurePauseMs;
private Long retryDelayMs;
private int maxAllowedErrors;
public PartialVertexLoader (JanusGraph graph, String fn, Long vertDelay, Long failurePause,
Long retryDelay, int maxErrors, Logger elfLog ){
jg = graph;
fName = fn;
vertAddDelayMs = vertDelay;
failurePauseMs = failurePause;
retryDelayMs = retryDelay;
maxAllowedErrors = maxErrors;
LOGGER = elfLog;
}
public HashMap<String,String> call() throws Exception {
// NOTE - we will be loading one node at a time so that bad nodes can be ignored instead of causing the
// entire load to fail.
//
int entryCount = 0;
int retryCount = 0;
int failureCount = 0;
int retryFailureCount = 0;
HashMap <String,String> failedAttemptHash = new HashMap <String,String> ();
HashMap <String,String> old2NewVtxIdHash = new HashMap <String,String> ();
// Read this file into a JSON object
JsonParser parser = new JsonParser();
try( BufferedReader br = new BufferedReader(new FileReader(fName))) {
// loop through the file lines and do PUT for each vertex or the edges depending on what the loadtype is
for(String line; (line = br.readLine()) != null; ) {
entryCount++;
Object ob = parser.parse(line);
JsonObject jObj = (JsonObject) ob;
// NOTE - we will need to keep track of how the newly generated vid's map
// to the old ones so we can aim the edges correctly later.
// ---- Note -- This ONLY loads the vertexId and the label for each vertex -------------
Thread.sleep(vertAddDelayMs);
String oldVtxIdStr = jObj.get("id").getAsString();
String vtxLabelStr = jObj.get("label").getAsString();
try {
Vertex tmpV = jg.addVertex(vtxLabelStr);
String newVtxIdStr = tmpV.id().toString();
old2NewVtxIdHash.put(oldVtxIdStr, newVtxIdStr);
}
catch ( Exception e ){
failureCount++;
Thread.sleep(failurePauseMs); // Slow down if things are failing
LOGGER.debug(" >> addVertex FAILED for vtxId = " + oldVtxIdStr + ", label = ["
+ vtxLabelStr + "]. ErrorMsg = [" + e.getMessage() + "]" );
failedAttemptHash.put(oldVtxIdStr, vtxLabelStr);
if( failureCount > maxAllowedErrors ) {
LOGGER.debug(" >>> Abandoning PartialVertexLoader() because " +
"Max Allowed Error count was exceeded for this thread. (max = " +
maxAllowedErrors + ". ");
throw new Exception(" ERROR - Max Allowed Error count exceeded for this thread. (max = " + maxAllowedErrors + ". ");
}
else {
continue;
}
}
try {
jg.tx().commit();
}
catch ( Exception e ){
failureCount++;
Thread.sleep(failurePauseMs); // Slow down if things are failing
LOGGER.debug(" -- COMMIT FAILED for Vtx ADD for vtxId = " + oldVtxIdStr + ", label = ["
+ vtxLabelStr + "]. ErrorMsg = [" +e.getMessage() + "]" );
failedAttemptHash.put(oldVtxIdStr, vtxLabelStr);
if( failureCount > maxAllowedErrors ) {
LOGGER.debug(">>> Abandoning PartialVertexLoader() because " +
"Max Allowed Error count was exceeded for this thread. (max = " +
maxAllowedErrors + ". ");
throw new Exception(" ERROR - Max Allowed Error count exceeded for this thread. (max = " + maxAllowedErrors + ". ");
}
else {
continue;
}
}
} // End of looping over each line
if( br != null ){
br.close();
}
}
catch (Exception e) {
LOGGER.debug(" --- Failed in the main loop for Buffered-Reader item # " + entryCount +
", fName = " + fName );
LOGGER.debug(" --- msg = " + e.getMessage() );
AAIException ae = new AAIException("AAI_6128", e , "Failed in the main loop for Buffered-Reader item");
ErrorLogHelper.logException(ae);
throw e;
}
// ---------------------------------------------------------------------------
// Now Re-Try any failed requests that might have Failed on the first pass.
// ---------------------------------------------------------------------------
try {
for (String failedVidStr : failedAttemptHash.keySet()) {
// Take a little nap, and retry this failed attempt
LOGGER.debug("DEBUG >> We will sleep for " + retryDelayMs + " and then RETRY any failed vertex ADDs. ");
Thread.sleep(retryDelayMs);
retryCount++;
// When a vertex Add fails we store the label as the data in the failedAttemptHash.
String failedLabel = failedAttemptHash.get(failedVidStr);
LOGGER.debug("DEBUG >> RETRY << " +
failedVidStr + ", label = " + failedLabel );
try {
Vertex tmpV = jg.addVertex(failedLabel);
String newVtxIdStr = tmpV.id().toString();
old2NewVtxIdHash.put(failedVidStr, newVtxIdStr);
}
catch ( Exception e ){
retryFailureCount++;
LOGGER.debug(" -- addVertex FAILED for RETRY for vtxId = " +
failedVidStr + ", label = [" + failedLabel +
"]. ErrorMsg = [" +e.getMessage() + "]" );
AAIException ae = new AAIException("AAI_6128", e , "addVertex FAILED for RETRY");
ErrorLogHelper.logException(ae);
if( retryFailureCount > maxAllowedErrors ) {
LOGGER.debug(">>> Abandoning PartialVertexLoader() because " +
"Max Allowed Error count was exceeded for this thread. (max = " +
maxAllowedErrors + ". ");
throw new Exception(" ERROR - Max Allowed Error count exceeded for this thread. (max = " + maxAllowedErrors + ". ");
}
else {
continue;
}
}
try {
jg.tx().commit();
LOGGER.debug(" -- addVertex Successful RETRY for vtxId = " +
failedVidStr + ", label = [" + failedLabel + "]");
}
catch ( Exception e ){
retryFailureCount++;
// Note - this is a "POSSIBLE" error because the reason the commit fails may be that
// the node is a dupe or has some other legit reason that it should not be in the DB.
LOGGER.debug(" --POSSIBLE ERROR-- COMMIT FAILED for RETRY for vtxId = " + failedVidStr
+ ", label = [" + failedLabel + "]. ErrorMsg = [" + e.getMessage()
+ "]. This vertex will not be tried again. ");
AAIException ae = new AAIException("AAI_6128", e , "--POSSIBLE ERROR-- COMMIT FAILED for RETRY");
ErrorLogHelper.logException(ae);
if( retryFailureCount > maxAllowedErrors ) {
LOGGER.debug(">>> Abandoning PartialVertexLoader() because " +
"Max Allowed Error count was exceeded for this thread. (max = " +
maxAllowedErrors + ". ");
throw new Exception(" ERROR - Max Allowed Error count exceeded for this thread. (max = " + maxAllowedErrors + ". ");
}
else {
continue;
}
}
} // End of looping over failed attempt hash and doing retries
}
catch ( Exception e ){
LOGGER.debug(" -- error in RETRY block. ErrorMsg = [" +e.getMessage() + "]" );
AAIException ae = new AAIException("AAI_6128", e , " -- error in RETRY block.");
ErrorLogHelper.logException(ae);
throw e;
}
// This would need to be properly logged...
LOGGER.debug(">>> After Processing in PartialVertexLoader(): " +
entryCount + " records processed. " + failureCount + " records failed. " +
retryCount + " RETRYs processed. " + retryFailureCount + " RETRYs failed. ");
return old2NewVtxIdHash;
}// end of call()
}
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