| /** |
| * 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.conf; |
| |
| import org.apache.hadoop.util.Time; |
| import org.junit.Test; |
| import org.junit.Before; |
| import static org.junit.Assert.*; |
| |
| import java.util.Collection; |
| import java.util.Arrays; |
| |
| public class TestReconfiguration { |
| private Configuration conf1; |
| private Configuration conf2; |
| |
| private static final String PROP1 = "test.prop.one"; |
| private static final String PROP2 = "test.prop.two"; |
| private static final String PROP3 = "test.prop.three"; |
| private static final String PROP4 = "test.prop.four"; |
| private static final String PROP5 = "test.prop.five"; |
| |
| private static final String VAL1 = "val1"; |
| private static final String VAL2 = "val2"; |
| |
| @Before |
| public void setUp () { |
| conf1 = new Configuration(); |
| conf2 = new Configuration(); |
| |
| // set some test properties |
| conf1.set(PROP1, VAL1); |
| conf1.set(PROP2, VAL1); |
| conf1.set(PROP3, VAL1); |
| |
| conf2.set(PROP1, VAL1); // same as conf1 |
| conf2.set(PROP2, VAL2); // different value as conf1 |
| // PROP3 not set in conf2 |
| conf2.set(PROP4, VAL1); // not set in conf1 |
| |
| } |
| |
| /** |
| * Test ReconfigurationUtil.getChangedProperties. |
| */ |
| @Test |
| public void testGetChangedProperties() { |
| Collection<ReconfigurationUtil.PropertyChange> changes = |
| ReconfigurationUtil.getChangedProperties(conf2, conf1); |
| |
| assertTrue("expected 3 changed properties but got " + changes.size(), |
| changes.size() == 3); |
| |
| boolean changeFound = false; |
| boolean unsetFound = false; |
| boolean setFound = false; |
| |
| for (ReconfigurationUtil.PropertyChange c: changes) { |
| if (c.prop.equals(PROP2) && c.oldVal != null && c.oldVal.equals(VAL1) && |
| c.newVal != null && c.newVal.equals(VAL2)) { |
| changeFound = true; |
| } else if (c.prop.equals(PROP3) && c.oldVal != null && c.oldVal.equals(VAL1) && |
| c.newVal == null) { |
| unsetFound = true; |
| } else if (c.prop.equals(PROP4) && c.oldVal == null && |
| c.newVal != null && c.newVal.equals(VAL1)) { |
| setFound = true; |
| } |
| } |
| |
| assertTrue("not all changes have been applied", |
| changeFound && unsetFound && setFound); |
| } |
| |
| /** |
| * a simple reconfigurable class |
| */ |
| public static class ReconfigurableDummy extends ReconfigurableBase |
| implements Runnable { |
| public volatile boolean running = true; |
| |
| public ReconfigurableDummy(Configuration conf) { |
| super(conf); |
| } |
| |
| @Override |
| public Collection<String> getReconfigurableProperties() { |
| return Arrays.asList(PROP1, PROP2, PROP4); |
| } |
| |
| @Override |
| public synchronized void reconfigurePropertyImpl(String property, |
| String newVal) { |
| // do nothing |
| } |
| |
| /** |
| * Run until PROP1 is no longer VAL1. |
| */ |
| @Override |
| public void run() { |
| while (running && getConf().get(PROP1).equals(VAL1)) { |
| try { |
| Thread.sleep(1); |
| } catch (InterruptedException ignore) { |
| // do nothing |
| } |
| } |
| } |
| |
| } |
| |
| /** |
| * Test reconfiguring a Reconfigurable. |
| */ |
| @Test |
| public void testReconfigure() { |
| ReconfigurableDummy dummy = new ReconfigurableDummy(conf1); |
| |
| assertTrue(PROP1 + " set to wrong value ", |
| dummy.getConf().get(PROP1).equals(VAL1)); |
| assertTrue(PROP2 + " set to wrong value ", |
| dummy.getConf().get(PROP2).equals(VAL1)); |
| assertTrue(PROP3 + " set to wrong value ", |
| dummy.getConf().get(PROP3).equals(VAL1)); |
| assertTrue(PROP4 + " set to wrong value ", |
| dummy.getConf().get(PROP4) == null); |
| assertTrue(PROP5 + " set to wrong value ", |
| dummy.getConf().get(PROP5) == null); |
| |
| assertTrue(PROP1 + " should be reconfigurable ", |
| dummy.isPropertyReconfigurable(PROP1)); |
| assertTrue(PROP2 + " should be reconfigurable ", |
| dummy.isPropertyReconfigurable(PROP2)); |
| assertFalse(PROP3 + " should not be reconfigurable ", |
| dummy.isPropertyReconfigurable(PROP3)); |
| assertTrue(PROP4 + " should be reconfigurable ", |
| dummy.isPropertyReconfigurable(PROP4)); |
| assertFalse(PROP5 + " should not be reconfigurable ", |
| dummy.isPropertyReconfigurable(PROP5)); |
| |
| // change something to the same value as before |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP1, VAL1); |
| assertTrue(PROP1 + " set to wrong value ", |
| dummy.getConf().get(PROP1).equals(VAL1)); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertFalse("received unexpected exception", |
| exceptionCaught); |
| } |
| |
| // change something to null |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP1, null); |
| assertTrue(PROP1 + "set to wrong value ", |
| dummy.getConf().get(PROP1) == null); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertFalse("received unexpected exception", |
| exceptionCaught); |
| } |
| |
| // change something to a different value than before |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP1, VAL2); |
| assertTrue(PROP1 + "set to wrong value ", |
| dummy.getConf().get(PROP1).equals(VAL2)); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertFalse("received unexpected exception", |
| exceptionCaught); |
| } |
| |
| // set unset property to null |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP4, null); |
| assertTrue(PROP4 + "set to wrong value ", |
| dummy.getConf().get(PROP4) == null); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertFalse("received unexpected exception", |
| exceptionCaught); |
| } |
| |
| // set unset property |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP4, VAL1); |
| assertTrue(PROP4 + "set to wrong value ", |
| dummy.getConf().get(PROP4).equals(VAL1)); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertFalse("received unexpected exception", |
| exceptionCaught); |
| } |
| |
| // try to set unset property to null (not reconfigurable) |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP5, null); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertTrue("did not receive expected exception", |
| exceptionCaught); |
| } |
| |
| // try to set unset property to value (not reconfigurable) |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP5, VAL1); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertTrue("did not receive expected exception", |
| exceptionCaught); |
| } |
| |
| // try to change property to value (not reconfigurable) |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP3, VAL2); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertTrue("did not receive expected exception", |
| exceptionCaught); |
| } |
| |
| // try to change property to null (not reconfigurable) |
| { |
| boolean exceptionCaught = false; |
| try { |
| dummy.reconfigureProperty(PROP3, null); |
| } catch (ReconfigurationException e) { |
| exceptionCaught = true; |
| } |
| assertTrue("did not receive expected exception", |
| exceptionCaught); |
| } |
| } |
| |
| /** |
| * Test whether configuration changes are visible in another thread. |
| */ |
| @Test |
| public void testThread() throws ReconfigurationException { |
| ReconfigurableDummy dummy = new ReconfigurableDummy(conf1); |
| assertTrue(dummy.getConf().get(PROP1).equals(VAL1)); |
| Thread dummyThread = new Thread(dummy); |
| dummyThread.start(); |
| try { |
| Thread.sleep(500); |
| } catch (InterruptedException ignore) { |
| // do nothing |
| } |
| dummy.reconfigureProperty(PROP1, VAL2); |
| |
| long endWait = Time.now() + 2000; |
| while (dummyThread.isAlive() && Time.now() < endWait) { |
| try { |
| Thread.sleep(50); |
| } catch (InterruptedException ignore) { |
| // do nothing |
| } |
| } |
| |
| assertFalse("dummy thread should not be alive", |
| dummyThread.isAlive()); |
| dummy.running = false; |
| try { |
| dummyThread.join(); |
| } catch (InterruptedException ignore) { |
| // do nothing |
| } |
| assertTrue(PROP1 + " is set to wrong value", |
| dummy.getConf().get(PROP1).equals(VAL2)); |
| |
| } |
| |
| } |