| /* |
| * 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.apache.rya.streams.client.command; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.Set; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.rya.streams.api.entity.StreamsQuery; |
| import org.apache.rya.streams.api.exception.RyaStreamsException; |
| import org.apache.rya.streams.api.interactor.ListQueries; |
| import org.apache.rya.streams.api.interactor.defaults.DefaultListQueries; |
| import org.apache.rya.streams.api.queries.InMemoryQueryRepository; |
| import org.apache.rya.streams.api.queries.QueryChangeLog; |
| import org.apache.rya.streams.api.queries.QueryRepository; |
| import org.apache.rya.streams.client.RyaStreamsCommand; |
| import org.apache.rya.streams.kafka.KafkaTopics; |
| import org.apache.rya.streams.kafka.queries.KafkaQueryChangeLogFactory; |
| |
| import com.beust.jcommander.JCommander; |
| import com.beust.jcommander.ParameterException; |
| import com.google.common.util.concurrent.AbstractScheduledService.Scheduler; |
| |
| import edu.umd.cs.findbugs.annotations.DefaultAnnotation; |
| import edu.umd.cs.findbugs.annotations.NonNull; |
| |
| /** |
| * A command that lists all queries currently in Rya Streams. |
| */ |
| @DefaultAnnotation(NonNull.class) |
| public class ListQueriesCommand implements RyaStreamsCommand { |
| |
| @Override |
| public String getCommand() { |
| return "list-queries"; |
| } |
| |
| @Override |
| public String getDescription() { |
| return "Lists all queries currently in Rya Streams."; |
| } |
| |
| @Override |
| public boolean validArguments(final String[] args) { |
| boolean valid = true; |
| try { |
| new JCommander(new KafkaParameters(), args); |
| } catch(final ParameterException e) { |
| valid = false; |
| } |
| return valid; |
| } |
| |
| @Override |
| public void execute(final String[] args) throws ArgumentsException, ExecutionException { |
| requireNonNull(args); |
| |
| // Parse the command line arguments. |
| final KafkaParameters params = new KafkaParameters(); |
| try { |
| new JCommander(params, args); |
| } catch (final ParameterException e) { |
| throw new ArgumentsException("Could not list the queries because of invalid command line parameters.", e); |
| } |
| |
| // Create the Kafka backed QueryChangeLog. |
| final String bootstrapServers = params.kafkaIP + ":" + params.kafkaPort; |
| final String topic = KafkaTopics.queryChangeLogTopic(params.ryaInstance); |
| final QueryChangeLog queryChangeLog = KafkaQueryChangeLogFactory.make(bootstrapServers, topic); |
| |
| //The ListQueries command doesn't use the scheduled service feature. |
| final Scheduler scheduler = Scheduler.newFixedRateSchedule(0L, 5, TimeUnit.SECONDS); |
| final QueryRepository queryRepo = new InMemoryQueryRepository(queryChangeLog, scheduler); |
| // Execute the list queries command. |
| try { |
| final ListQueries listQueries = new DefaultListQueries(queryRepo); |
| try { |
| final Set<StreamsQuery> queries = listQueries.all(); |
| System.out.println( formatQueries(queries) ); |
| } catch (final RyaStreamsException e) { |
| System.err.println("Unable to retrieve the queries."); |
| e.printStackTrace(); |
| System.exit(1); |
| } |
| } catch (final Exception e) { |
| System.err.println("Problem encountered while closing the QueryRepository."); |
| e.printStackTrace(); |
| System.exit(1); |
| } |
| } |
| |
| private String formatQueries(final Set<StreamsQuery> queries) { |
| final StringBuilder sb = new StringBuilder(); |
| sb.append("\n"); |
| sb.append("Queries in Rya Streams:\n"); |
| sb.append("---------------------------------------------------------\n"); |
| queries.forEach(query -> { |
| sb.append("ID: ").append(query.getQueryId()) |
| .append(" ") |
| .append("Is Active: ").append(query.isActive()) |
| .append( query.isActive() ? " " : " " ) |
| .append("Is Insert: ").append(query.isInsert()) |
| .append(query.isInsert() ? " " : " ") |
| .append("Query: ").append(query.getSparql()).append("\n"); |
| }); |
| return sb.toString(); |
| } |
| } |