[37/50] [abbrv] hadoop git commit: HDFS-10646. Federation admin tool. Contributed by Inigo Goiri.

[in...@apache.org]

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ae5673b7/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterAdmin.java
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diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterAdmin.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterAdmin.java
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+/**
+ * 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.hdfs.server.federation.router;
+
+import static org.apache.hadoop.hdfs.server.federation.store.FederationStateStoreTestUtils.synchronizeRecords;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdfs.server.federation.RouterConfigBuilder;
+import org.apache.hadoop.hdfs.server.federation.RouterDFSCluster.RouterContext;
+import org.apache.hadoop.hdfs.server.federation.StateStoreDFSCluster;
+import org.apache.hadoop.hdfs.server.federation.resolver.MountTableManager;
+import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation;
+import org.apache.hadoop.hdfs.server.federation.store.StateStoreService;
+import org.apache.hadoop.hdfs.server.federation.store.impl.MountTableStoreImpl;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.AddMountTableEntryRequest;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.AddMountTableEntryResponse;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesRequest;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.GetMountTableEntriesResponse;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.RemoveMountTableEntryRequest;
+import org.apache.hadoop.hdfs.server.federation.store.protocol.UpdateMountTableEntryRequest;
+import org.apache.hadoop.hdfs.server.federation.store.records.MountTable;
+import org.apache.hadoop.util.Time;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+/**
+ * The administrator interface of the {@link Router} implemented by
+ * {@link RouterAdminServer}.
+ */
+public class TestRouterAdmin {
+
+  private static StateStoreDFSCluster cluster;
+  private static RouterContext routerContext;
+  public static final String RPC_BEAN =
+      "Hadoop:service=Router,name=FederationRPC";
+  private static List<MountTable> mockMountTable;
+  private static StateStoreService stateStore;
+
+  @BeforeClass
+  public static void globalSetUp() throws Exception {
+    cluster = new StateStoreDFSCluster(false, 1);
+    // Build and start a router with State Store + admin + RPC
+    Configuration conf = new RouterConfigBuilder()
+        .stateStore()
+        .admin()
+        .rpc()
+        .build();
+    cluster.addRouterOverrides(conf);
+    cluster.startRouters();
+    routerContext = cluster.getRandomRouter();
+    mockMountTable = cluster.generateMockMountTable();
+    Router router = routerContext.getRouter();
+    stateStore = router.getStateStore();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    cluster.stopRouter(routerContext);
+  }
+
+  @Before
+  public void testSetup() throws Exception {
+    assertTrue(
+        synchronizeRecords(stateStore, mockMountTable, MountTable.class));
+  }
+
+  @Test
+  public void testAddMountTable() throws IOException {
+    MountTable newEntry = MountTable.newInstance(
+        "/testpath", Collections.singletonMap("ns0", "/testdir"),
+        Time.now(), Time.now());
+
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+
+    // Existing mount table size
+    List<MountTable> records = getMountTableEntries(mountTable);
+    assertEquals(records.size(), mockMountTable.size());
+
+    // Add
+    AddMountTableEntryRequest addRequest =
+        AddMountTableEntryRequest.newInstance(newEntry);
+    AddMountTableEntryResponse addResponse =
+        mountTable.addMountTableEntry(addRequest);
+    assertTrue(addResponse.getStatus());
+
+    // New mount table size
+    List<MountTable> records2 = getMountTableEntries(mountTable);
+    assertEquals(records2.size(), mockMountTable.size() + 1);
+  }
+
+  @Test
+  public void testAddDuplicateMountTable() throws IOException {
+    MountTable newEntry = MountTable.newInstance("/testpath",
+        Collections.singletonMap("ns0", "/testdir"), Time.now(), Time.now());
+
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+
+    // Existing mount table size
+    List<MountTable> entries1 = getMountTableEntries(mountTable);
+    assertEquals(entries1.size(), mockMountTable.size());
+
+    // Add
+    AddMountTableEntryRequest addRequest =
+        AddMountTableEntryRequest.newInstance(newEntry);
+    AddMountTableEntryResponse addResponse =
+        mountTable.addMountTableEntry(addRequest);
+    assertTrue(addResponse.getStatus());
+
+    // New mount table size
+    List<MountTable> entries2 = getMountTableEntries(mountTable);
+    assertEquals(entries2.size(), mockMountTable.size() + 1);
+
+    // Add again, should fail
+    AddMountTableEntryResponse addResponse2 =
+        mountTable.addMountTableEntry(addRequest);
+    assertFalse(addResponse2.getStatus());
+  }
+
+  @Test
+  public void testRemoveMountTable() throws IOException {
+
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+
+    // Existing mount table size
+    List<MountTable> entries1 = getMountTableEntries(mountTable);
+    assertEquals(entries1.size(), mockMountTable.size());
+
+    // Remove an entry
+    RemoveMountTableEntryRequest removeRequest =
+        RemoveMountTableEntryRequest.newInstance("/");
+    mountTable.removeMountTableEntry(removeRequest);
+
+    // New mount table size
+    List<MountTable> entries2 = getMountTableEntries(mountTable);
+    assertEquals(entries2.size(), mockMountTable.size() - 1);
+  }
+
+  @Test
+  public void testEditMountTable() throws IOException {
+
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+
+    // Verify starting condition
+    MountTable entry = getMountTableEntry("/");
+    assertEquals(
+        Collections.singletonList(new RemoteLocation("ns0", "/")),
+        entry.getDestinations());
+
+    // Edit the entry for /
+    MountTable updatedEntry = MountTable.newInstance(
+        "/", Collections.singletonMap("ns1", "/"), Time.now(), Time.now());
+    UpdateMountTableEntryRequest updateRequest =
+        UpdateMountTableEntryRequest.newInstance(updatedEntry);
+    mountTable.updateMountTableEntry(updateRequest);
+
+    // Verify edited condition
+    entry = getMountTableEntry("/");
+    assertEquals(
+        Collections.singletonList(new RemoteLocation("ns1", "/")),
+        entry.getDestinations());
+  }
+
+  @Test
+  public void testGetMountTable() throws IOException {
+
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+
+    // Verify size of table
+    List<MountTable> entries = getMountTableEntries(mountTable);
+    assertEquals(mockMountTable.size(), entries.size());
+
+    // Verify all entries are present
+    int matches = 0;
+    for (MountTable e : entries) {
+      for (MountTable entry : mockMountTable) {
+        assertEquals(e.getDestinations().size(), 1);
+        assertNotNull(e.getDateCreated());
+        assertNotNull(e.getDateModified());
+        if (entry.getSourcePath().equals(e.getSourcePath())) {
+          matches++;
+        }
+      }
+    }
+    assertEquals(matches, mockMountTable.size());
+  }
+
+  @Test
+  public void testGetSingleMountTableEntry() throws IOException {
+    MountTable entry = getMountTableEntry("/ns0");
+    assertNotNull(entry);
+    assertEquals(entry.getSourcePath(), "/ns0");
+  }
+
+  /**
+   * Gets an existing mount table record in the state store.
+   *
+   * @param mount The mount point of the record to remove.
+   * @return The matching record if found, null if it is not found.
+   * @throws IOException If the state store could not be accessed.
+   */
+  private MountTable getMountTableEntry(final String mount) throws IOException {
+    // Refresh the cache
+    stateStore.loadCache(MountTableStoreImpl.class, true);
+
+    GetMountTableEntriesRequest request =
+        GetMountTableEntriesRequest.newInstance(mount);
+    RouterClient client = routerContext.getAdminClient();
+    MountTableManager mountTable = client.getMountTableManager();
+    List<MountTable> results = getMountTableEntries(mountTable, request);
+    if (results.size() > 0) {
+      // First result is sorted to have the shortest mount string length
+      return results.get(0);
+    }
+    return null;
+  }
+
+  private List<MountTable> getMountTableEntries(MountTableManager mountTable)
+      throws IOException {
+    GetMountTableEntriesRequest request =
+        GetMountTableEntriesRequest.newInstance("/");
+    return getMountTableEntries(mountTable, request);
+  }
+
+  private List<MountTable> getMountTableEntries(MountTableManager mountTable,
+      GetMountTableEntriesRequest request) throws IOException {
+    stateStore.loadCache(MountTableStoreImpl.class, true);
+    GetMountTableEntriesResponse response =
+        mountTable.getMountTableEntries(request);
+    return response.getEntries();
+  }
+}
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