Java tutorial
/* * 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. */ package com.facebook.presto.execution; import com.facebook.presto.Session; import com.facebook.presto.spi.QueryId; import com.facebook.presto.sql.parser.SqlParserOptions; import com.facebook.presto.tests.DistributedQueryRunner; import com.facebook.presto.tpch.TpchPlugin; import com.facebook.presto.transaction.TransactionId; import com.google.common.collect.ImmutableMap; import com.google.common.collect.ImmutableSet; import java.util.Map; import java.util.Set; import static com.facebook.presto.execution.QueryState.RUNNING; import static com.facebook.presto.testing.TestingSession.testSessionBuilder; import static java.util.concurrent.TimeUnit.MILLISECONDS; public final class QueryRunnerUtil { private QueryRunnerUtil() { } public static QueryId createQuery(DistributedQueryRunner queryRunner, Session session, String sql) { return queryRunner.getCoordinator().getQueryManager().createQuery(new TestingSessionFactory(session), sql) .getQueryId(); } public static QueryId createQuery(DistributedQueryRunner queryRunner, Session session, TransactionId txnId, String sql) { return queryRunner.getCoordinator().getQueryManager() .createQuery(new TestingSessionFactory(session, txnId), sql).getQueryId(); } public static void cancelQuery(DistributedQueryRunner queryRunner, QueryId queryId) { queryRunner.getCoordinator().getQueryManager().cancelQuery(queryId); } public static void waitForQueryState(DistributedQueryRunner queryRunner, QueryId queryId, QueryState expectedQueryState) throws InterruptedException { waitForQueryState(queryRunner, queryId, ImmutableSet.of(expectedQueryState)); } public static void waitForQueryState(DistributedQueryRunner queryRunner, QueryId queryId, Set<QueryState> expectedQueryStates) throws InterruptedException { QueryManager queryManager = queryRunner.getCoordinator().getQueryManager(); do { // Heartbeat all the running queries, so they don't die while we're waiting for (QueryInfo queryInfo : queryManager.getAllQueryInfo()) { if (queryInfo.getState() == RUNNING) { queryManager.recordHeartbeat(queryInfo.getQueryId()); } } MILLISECONDS.sleep(500); } while (!expectedQueryStates.contains(queryManager.getQueryInfo(queryId).getState())); } public static DistributedQueryRunner createQueryRunner(Map<String, String> properties) throws Exception { DistributedQueryRunner queryRunner = new DistributedQueryRunner(testSessionBuilder().build(), 2, ImmutableMap.of(), properties, new SqlParserOptions()); try { queryRunner.installPlugin(new TpchPlugin()); queryRunner.createCatalog("tpch", "tpch"); return queryRunner; } catch (Exception e) { queryRunner.close(); throw e; } } }