use of edu.uci.ics.texera.dataflow.plangen.LogicalPlan in project textdb by TextDB.
the class QueryPlanResourceTest method getLogicalPlan1.
/*
* It generates a valid logical plan as follows.
*
* KeywordSource --> RegexMatcher --> TupleSink
*
*/
public static LogicalPlan getLogicalPlan1() throws TexeraException {
LogicalPlan logicalPlan = new LogicalPlan();
logicalPlan.addOperator(keywordSourcePredicate);
logicalPlan.addOperator(regexPredicate);
logicalPlan.addOperator(tupleSinkPredicate);
logicalPlan.addLink(new OperatorLink(KEYWORD_SOURCE_ID, REGEX_ID));
logicalPlan.addLink(new OperatorLink(REGEX_ID, TUPLE_SINK_ID));
return logicalPlan;
}
use of edu.uci.ics.texera.dataflow.plangen.LogicalPlan in project textdb by TextDB.
the class QueryPlanResource method executeQueryPlan.
/**
* This is the edu.uci.ics.texera.web.request handler for the execution of a Query Plan.
* @param logicalPlanJson, the json representation of the logical plan
* @return - Generic TexeraWebResponse object
*/
@POST
@Path("/execute")
public // TODO: investigate how to use LogicalPlan directly
JsonNode executeQueryPlan(String logicalPlanJson) {
try {
LogicalPlan logicalPlan = new ObjectMapper().readValue(logicalPlanJson, LogicalPlan.class);
Plan plan = logicalPlan.buildQueryPlan();
ISink sink = plan.getRoot();
// send response back to frontend
if (sink instanceof TupleSink) {
TupleSink tupleSink = (TupleSink) sink;
tupleSink.open();
List<Tuple> results = tupleSink.collectAllTuples();
tupleSink.close();
// make sure result directory is created
if (Files.notExists(resultDirectory)) {
Files.createDirectories(resultDirectory);
}
// clean up old result files
cleanupOldResults();
// generate new UUID as the result id
String resultID = UUID.randomUUID().toString();
// write original json of the result into a file
java.nio.file.Path resultFile = resultDirectory.resolve(resultID + ".json");
Files.createFile(resultFile);
Files.write(resultFile, new ObjectMapper().writeValueAsBytes(results));
// put readable json of the result into response
ArrayNode resultNode = new ObjectMapper().createArrayNode();
for (Tuple tuple : results) {
resultNode.add(tuple.getReadableJson());
}
ObjectNode response = new ObjectMapper().createObjectNode();
response.put("code", 0);
response.set("result", resultNode);
response.put("resultID", resultID);
return response;
} else {
// execute the plan and return success message
Engine.getEngine().evaluate(plan);
ObjectNode response = new ObjectMapper().createObjectNode();
response.put("code", 1);
response.put("message", "plan sucessfully executed");
return response;
}
} catch (IOException | TexeraException e) {
throw new TexeraWebException(e.getMessage());
}
}
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