Java tutorial
/** * 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.hadoop.hbase.client; import static org.hamcrest.CoreMatchers.instanceOf; import static org.junit.Assert.assertArrayEquals; import static org.junit.Assert.assertThat; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import java.io.IOException; import java.util.concurrent.CompletableFuture; import java.util.concurrent.ExecutionException; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicInteger; import org.apache.commons.io.IOUtils; import org.apache.hadoop.hbase.HBaseTestingUtility; import org.apache.hadoop.hbase.HRegionLocation; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.security.User; import org.apache.hadoop.hbase.testclassification.ClientTests; import org.apache.hadoop.hbase.testclassification.MediumTests; import org.apache.hadoop.hbase.util.Bytes; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.Test; import org.junit.experimental.categories.Category; @Category({ MediumTests.class, ClientTests.class }) public class TestAsyncSingleRequestRpcRetryingCaller { private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility(); private static TableName TABLE_NAME = TableName.valueOf("async"); private static byte[] FAMILY = Bytes.toBytes("cf"); private static byte[] QUALIFIER = Bytes.toBytes("cq"); private static byte[] ROW = Bytes.toBytes("row"); private static byte[] VALUE = Bytes.toBytes("value"); private static AsyncConnectionImpl CONN; @BeforeClass public static void setUpBeforeClass() throws Exception { TEST_UTIL.startMiniCluster(2); TEST_UTIL.getAdmin().setBalancerRunning(false, true); TEST_UTIL.createTable(TABLE_NAME, FAMILY); TEST_UTIL.waitTableAvailable(TABLE_NAME); AsyncRegistry registry = AsyncRegistryFactory.getRegistry(TEST_UTIL.getConfiguration()); CONN = new AsyncConnectionImpl(TEST_UTIL.getConfiguration(), registry, registry.getClusterId().get(), User.getCurrent()); } @AfterClass public static void tearDownAfterClass() throws Exception { IOUtils.closeQuietly(CONN); TEST_UTIL.shutdownMiniCluster(); } @Test public void testRegionMove() throws InterruptedException, ExecutionException, IOException { // This will leave a cached entry in location cache HRegionLocation loc = CONN.getRegionLocator(TABLE_NAME).getRegionLocation(ROW).get(); int index = TEST_UTIL.getHBaseCluster().getServerWith(loc.getRegionInfo().getRegionName()); TEST_UTIL.getAdmin().move(loc.getRegionInfo().getEncodedNameAsBytes(), Bytes .toBytes(TEST_UTIL.getHBaseCluster().getRegionServer(1 - index).getServerName().getServerName())); RawAsyncTable table = CONN.getRawTableBuilder(TABLE_NAME).setRetryPause(100, TimeUnit.MILLISECONDS) .setMaxRetries(30).build(); table.put(new Put(ROW).addColumn(FAMILY, QUALIFIER, VALUE)).get(); // move back TEST_UTIL.getAdmin().move(loc.getRegionInfo().getEncodedNameAsBytes(), Bytes.toBytes(loc.getServerName().getServerName())); Result result = table.get(new Get(ROW).addColumn(FAMILY, QUALIFIER)).get(); assertArrayEquals(VALUE, result.getValue(FAMILY, QUALIFIER)); } private <T> CompletableFuture<T> failedFuture() { CompletableFuture<T> future = new CompletableFuture<>(); future.completeExceptionally(new RuntimeException("Inject error!")); return future; } @Test public void testMaxRetries() throws IOException, InterruptedException { try { CONN.callerFactory.single().table(TABLE_NAME).row(ROW).operationTimeout(1, TimeUnit.DAYS).maxAttempts(3) .pause(10, TimeUnit.MILLISECONDS).action((controller, loc, stub) -> failedFuture()).call() .get(); fail(); } catch (ExecutionException e) { assertThat(e.getCause(), instanceOf(RetriesExhaustedException.class)); } } @Test public void testOperationTimeout() throws IOException, InterruptedException { long startNs = System.nanoTime(); try { CONN.callerFactory.single().table(TABLE_NAME).row(ROW).operationTimeout(1, TimeUnit.SECONDS) .pause(100, TimeUnit.MILLISECONDS).maxAttempts(Integer.MAX_VALUE) .action((controller, loc, stub) -> failedFuture()).call().get(); fail(); } catch (ExecutionException e) { e.printStackTrace(); assertThat(e.getCause(), instanceOf(RetriesExhaustedException.class)); } long costNs = System.nanoTime() - startNs; assertTrue(costNs >= TimeUnit.SECONDS.toNanos(1)); assertTrue(costNs < TimeUnit.SECONDS.toNanos(2)); } @Test public void testLocateError() throws IOException, InterruptedException, ExecutionException { AtomicBoolean errorTriggered = new AtomicBoolean(false); AtomicInteger count = new AtomicInteger(0); HRegionLocation loc = CONN.getRegionLocator(TABLE_NAME).getRegionLocation(ROW).get(); AsyncRegionLocator mockedLocator = new AsyncRegionLocator(CONN, AsyncConnectionImpl.RETRY_TIMER) { @Override CompletableFuture<HRegionLocation> getRegionLocation(TableName tableName, byte[] row, RegionLocateType locateType, long timeoutNs) { if (tableName.equals(TABLE_NAME)) { CompletableFuture<HRegionLocation> future = new CompletableFuture<>(); if (count.getAndIncrement() == 0) { errorTriggered.set(true); future.completeExceptionally(new RuntimeException("Inject error!")); } else { future.complete(loc); } return future; } else { return super.getRegionLocation(tableName, row, locateType, timeoutNs); } } @Override void updateCachedLocation(HRegionLocation loc, Throwable exception) { } }; try (AsyncConnectionImpl mockedConn = new AsyncConnectionImpl(CONN.getConfiguration(), CONN.registry, CONN.registry.getClusterId().get(), User.getCurrent()) { @Override AsyncRegionLocator getLocator() { return mockedLocator; } }) { RawAsyncTable table = mockedConn.getRawTableBuilder(TABLE_NAME) .setRetryPause(100, TimeUnit.MILLISECONDS).setMaxRetries(5).build(); table.put(new Put(ROW).addColumn(FAMILY, QUALIFIER, VALUE)).get(); assertTrue(errorTriggered.get()); errorTriggered.set(false); count.set(0); Result result = table.get(new Get(ROW).addColumn(FAMILY, QUALIFIER)).get(); assertArrayEquals(VALUE, result.getValue(FAMILY, QUALIFIER)); assertTrue(errorTriggered.get()); } } }