YARN-9999. TestFSSchedulerConfigurationStore: Extend from ConfigurationStoreBaseTest, general code cleanup. Contributed by Benjamin Teke

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/ConfigurationStoreBaseTest.java

@@ -78,13 +78,24 @@ public void testNullConfigurationUpdate() throws Exception {
     confStore.close();
   }
 
-  YarnConfigurationStore.LogMutation prepareLogMutation(String key,
-                                                        String value)
+  YarnConfigurationStore.LogMutation prepareLogMutation(String... values)
       throws Exception {
-    Map<String, String> update = new HashMap<>();
-    update.put(key, value);
+    Map<String, String> updates = new HashMap<>();
+    String key;
+    String value;
+
+    if (values.length % 2 != 0) {
+      throw new IllegalArgumentException("The number of parameters should be " +
+        "even.");
+    }
+
+    for (int i = 1; i <= values.length; i += 2) {
+      key = values[i - 1];
+      value = values[i];
+      updates.put(key, value);
+    }
     YarnConfigurationStore.LogMutation mutation =
-        new YarnConfigurationStore.LogMutation(update, TEST_USER);
+        new YarnConfigurationStore.LogMutation(updates, TEST_USER);
     confStore.logMutation(mutation);
 
     return mutation;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/PersistentConfigurationStoreBaseTest.java

@@ -25,6 +25,7 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assume.assumeFalse;
 
 /**
  * Base class for the persistent {@link YarnConfigurationStore}
@@ -94,6 +95,9 @@ public void testVersion() throws Exception {
 
   @Test
   public void testMaxLogs() throws Exception {
+    assumeFalse("test should be skipped for TestFSSchedulerConfigurationStore",
+      this instanceof TestFSSchedulerConfigurationStore);
+
     conf.setLong(YarnConfiguration.RM_SCHEDCONF_MAX_LOGS, 2);
     confStore.initialize(conf, schedConf, rmContext);
     LinkedList<YarnConfigurationStore.LogMutation> logs = confStore.getLogs();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/conf/TestFSSchedulerConfigurationStore.java

@@ -20,7 +20,6 @@
 
 import java.io.File;
 import java.io.IOException;
-import java.util.HashMap;
 import java.util.Map;
 
 import org.apache.commons.io.FileUtils;
@@ -31,36 +30,34 @@
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
-import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.YarnConfigurationStore.LogMutation;
+import org.apache.hadoop.yarn.server.records.Version;
 import org.hamcrest.CoreMatchers;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
 import static org.junit.Assert.assertThat;
 
 
 /**
  * Tests {@link FSSchedulerConfigurationStore}.
  */
-public class TestFSSchedulerConfigurationStore {
-  private static final String TEST_USER = "test";
-  private FSSchedulerConfigurationStore configurationStore;
-  private Configuration conf;
+public class TestFSSchedulerConfigurationStore extends
+    PersistentConfigurationStoreBaseTest {
   private File testSchedulerConfigurationDir;
 
   @Before
+  @Override
   public void setUp() throws Exception {
-    configurationStore = new FSSchedulerConfigurationStore();
+    super.setUp();
     testSchedulerConfigurationDir = new File(
         TestFSSchedulerConfigurationStore.class.getResource("").getPath()
             + FSSchedulerConfigurationStore.class.getSimpleName());
     testSchedulerConfigurationDir.mkdirs();
 
-    conf = new Configuration();
     conf.set(YarnConfiguration.SCHEDULER_CONFIGURATION_FS_PATH,
         testSchedulerConfigurationDir.getAbsolutePath());
   }
@@ -81,34 +78,41 @@ public void tearDown() throws Exception {
     FileUtils.deleteDirectory(testSchedulerConfigurationDir);
   }
 
+  @Test
+  public void checkVersion() {
+    try {
+      confStore.checkVersion();
+    } catch (Exception e) {
+      fail("checkVersion throw exception");
+    }
+  }
+
   @Test
   public void confirmMutationWithValid() throws Exception {
     conf.setInt(
-        YarnConfiguration.SCHEDULER_CONFIGURATION_FS_MAX_VERSION, 2);
+      YarnConfiguration.SCHEDULER_CONFIGURATION_FS_MAX_VERSION, 2);
     conf.set("a", "a");
     conf.set("b", "b");
     conf.set("c", "c");
     writeConf(conf);
-    configurationStore.initialize(conf, conf, null);
-    Configuration storeConf = configurationStore.retrieve();
+    confStore.initialize(conf, conf, null);
+    Configuration storeConf = confStore.retrieve();
     compareConfig(conf, storeConf);
 
     Configuration expectConfig = new Configuration(conf);
     expectConfig.unset("a");
     expectConfig.set("b", "bb");
 
-    prepareParameterizedLogMutation(configurationStore, true,
-        "a", null, "b", "bb");
-    storeConf = configurationStore.retrieve();
+    confStore.confirmMutation(prepareLogMutation("a", null, "b", "bb"), true);
+    storeConf = confStore.retrieve();
     assertNull(storeConf.get("a"));
     assertEquals("bb", storeConf.get("b"));
     assertEquals("c", storeConf.get("c"));
 
     compareConfig(expectConfig, storeConf);
 
-    prepareParameterizedLogMutation(configurationStore, true,
-        "a", null, "b", "bbb");
-    storeConf = configurationStore.retrieve();
+    confStore.confirmMutation(prepareLogMutation("a", null, "b", "bbb"), true);
+    storeConf = confStore.retrieve();
     assertNull(storeConf.get("a"));
     assertEquals("bbb", storeConf.get("b"));
     assertEquals("c", storeConf.get("c"));
@@ -120,17 +124,51 @@ public void confirmMutationWithInvalid() throws Exception {
     conf.set("b", "b");
     conf.set("c", "c");
     writeConf(conf);
-    configurationStore.initialize(conf, conf, null);
-    Configuration storeConf = configurationStore.retrieve();
+    confStore.initialize(conf, conf, null);
+    Configuration storeConf = confStore.retrieve();
     compareConfig(conf, storeConf);
 
-    prepareParameterizedLogMutation(configurationStore, false,
-        "a", null, "b", "bb");
-    storeConf = configurationStore.retrieve();
+    confStore.confirmMutation(prepareLogMutation("a", null, "b", "bb"), false);
+    storeConf = confStore.retrieve();
 
     compareConfig(conf, storeConf);
   }
 
+  @Test
+  public void testConfigRetrieval() throws Exception {
+    Configuration schedulerConf = new Configuration();
+    schedulerConf.set("a", "a");
+    schedulerConf.setLong("long", 1L);
+    schedulerConf.setBoolean("boolean", true);
+    writeConf(schedulerConf);
+
+    confStore.initialize(conf, conf, null);
+    Configuration storedConfig = confStore.retrieve();
+
+    compareConfig(schedulerConf, storedConfig);
+  }
+
+  @Test
+  public void testFormatConfiguration() throws Exception {
+    Configuration persistedSchedConf = new Configuration();
+    persistedSchedConf.set("a", "a");
+    writeConf(persistedSchedConf);
+    confStore.initialize(conf, conf, null);
+    Configuration storedConfig = confStore.retrieve();
+    assertEquals("Retrieved config should match the stored one", "a",
+        storedConfig.get("a"));
+    confStore.format();
+    try {
+      confStore.retrieve();
+      fail("Expected an IOException with message containing \"no capacity " +
+          "scheduler file in\" to be thrown");
+    } catch (IOException e) {
+      assertThat("Exception message should contain the predefined string.",
+          e.getMessage(),
+          CoreMatchers.containsString("no capacity scheduler file in"));
+    }
+  }
+
   @Test
   public void testFileSystemClose() throws Exception {
     MiniDFSCluster hdfsCluster = null;
@@ -146,18 +184,15 @@ public void testFileSystemClose() throws Exception {
         fs.mkdirs(path);
       }
 
-      FSSchedulerConfigurationStore configStore =
-          new FSSchedulerConfigurationStore();
       hdfsConfig.set(YarnConfiguration.SCHEDULER_CONFIGURATION_FS_PATH,
           path.toString());
-      configStore.initialize(hdfsConfig, hdfsConfig, null);
+      confStore.initialize(hdfsConfig, hdfsConfig, null);
 
       // Close the FileSystem object and validate
       fs.close();
 
       try {
-        prepareParameterizedLogMutation(configStore, true,
-            "testkey", "testvalue");
+        confStore.confirmMutation(prepareLogMutation("key", "val"), true);
       } catch (IOException e) {
         if (e.getMessage().contains("Filesystem closed")) {
           fail("FSSchedulerConfigurationStore failed to handle " +
@@ -176,50 +211,8 @@ public void testFileSystemClose() throws Exception {
     }
   }
 
-  @Test
-  public void testFormatConfiguration() throws Exception {
-    Configuration schedulerConf = new Configuration();
-    schedulerConf.set("a", "a");
-    writeConf(schedulerConf);
-    configurationStore.initialize(conf, conf, null);
-    Configuration storedConfig = configurationStore.retrieve();
-    assertEquals("a", storedConfig.get("a"));
-    configurationStore.format();
-    try {
-      configurationStore.retrieve();
-      fail("Expected an IOException with message containing \"no capacity " +
-          "scheduler file in\" to be thrown");
-    } catch (IOException e) {
-      assertThat(e.getMessage(),
-          CoreMatchers.containsString("no capacity scheduler file in"));
-    }
-  }
-
-  @Test
-  public void retrieve() throws Exception {
-    Configuration schedulerConf = new Configuration();
-    schedulerConf.set("a", "a");
-    schedulerConf.setLong("long", 1L);
-    schedulerConf.setBoolean("boolean", true);
-    writeConf(schedulerConf);
-
-    configurationStore.initialize(conf, conf, null);
-    Configuration storedConfig = configurationStore.retrieve();
-
-    compareConfig(schedulerConf, storedConfig);
-  }
-
-  @Test
-  public void checkVersion() {
-    try {
-      configurationStore.checkVersion();
-    } catch (Exception e) {
-      fail("checkVersion throw exception");
-    }
-  }
-
   private void compareConfig(Configuration schedulerConf,
-      Configuration storedConfig) {
+                             Configuration storedConfig) {
     for (Map.Entry<String, String> entry : schedulerConf) {
       assertEquals(entry.getKey(), schedulerConf.get(entry.getKey()),
           storedConfig.get(entry.getKey()));
@@ -231,26 +224,13 @@ private void compareConfig(Configuration schedulerConf,
     }
   }
 
-  private void prepareParameterizedLogMutation(
-      FSSchedulerConfigurationStore configStore,
-      boolean validityFlag, String... values) throws Exception {
-    Map<String, String> updates = new HashMap<>();
-    String key;
-    String value;
+  @Override
+  public YarnConfigurationStore createConfStore() {
+    return new FSSchedulerConfigurationStore();
+  }
 
-    if (values.length % 2 != 0) {
-      throw new IllegalArgumentException("The number of parameters should be " +
-          "even.");
-    }
-
-    for (int i = 1; i <= values.length; i += 2) {
-      key = values[i - 1];
-      value = values[i];
-      updates.put(key, value);
-    }
-
-    LogMutation logMutation = new LogMutation(updates, TEST_USER);
-    configStore.logMutation(logMutation);
-    configStore.confirmMutation(logMutation, validityFlag);
+  @Override
+  Version getVersion() {
+    return null;
   }
 }