fix bug of aysnc left index delete

hugegraph-core/src/main/java/com/baidu/hugegraph/backend/tx/GraphIndexTransaction.java

@@ -91,7 +91,7 @@ protected Id asyncRemoveIndexLeft(ConditionQuery query,
                                       HugeElement element) {
         RemoveLeftIndexJob callable = new RemoveLeftIndexJob(query, element);
         HugeTask<?> task = EphemeralJobBuilder.of(this.graph())
-                                              .name(element.name())
+                                              .name(element.id().asString())
                                               .job(callable)
                                               .schedule();
         return task.id();
@@ -1199,6 +1199,9 @@ private boolean deletedByError(HugeElement element,
                                        Collection<Id> ilFields,
                                        Map<PropertyKey, Object> incorrectPKs) {
             HugeElement elem = this.newestElement(element);
+            if (elem == null) {
+                return false;
+            }
             for (Map.Entry<PropertyKey, Object> e : incorrectPKs.entrySet()) {
                 PropertyKey pk = e.getKey();
                 Object value = e.getValue();

hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeVertex.java

@@ -93,12 +93,15 @@ public VertexLabel schemaLabel() {
 
     @Override
     public String name() {
-        assert this.label.idStrategy() == IdStrategy.PRIMARY_KEY;
+        E.checkState(this.label.idStrategy() == IdStrategy.PRIMARY_KEY,
+                     "Only primary key vertex has name, " +
+                     "but got '%s' with id strategy '%s'",
+                     this, this.label.idStrategy());
         if (this.name == null) {
             if (this.id != null) {
                 String[] parts = SplicingIdGenerator.parse(this.id);
                 E.checkState(parts.length == 2,
-                             "Invalid vertex id '%s'", this.id);
+                             "Invalid primary key vertex id '%s'", this.id);
                 this.name = parts[1];
             } else {
                 assert this.id == null;

hugegraph-test/src/main/java/com/baidu/hugegraph/api/ApiTestSuite.java

@@ -33,6 +33,7 @@
     IndexLabelApiTest.class,
     VertexApiTest.class,
     EdgeApiTest.class,
+    TaskApiTest.class,
     GremlinApiTest.class,
     MetricsApiTest.class
 })

hugegraph-test/src/main/java/com/baidu/hugegraph/api/BaseApiTest.java

@@ -249,6 +249,20 @@ protected static void initEdgeLabel() {
                 + "}");
     }
 
+    protected static void initIndexLabel() {
+        String path = URL_PREFIX + SCHEMA_ILS;
+
+        client.post(path, "{\n"
+                + "\"name\": \"personByCity\",\n"
+                + "\"base_type\": \"VERTEX_LABEL\",\n"
+                + "\"base_value\": \"person\",\n"
+                + "\"index_type\": \"SECONDARY\",\n"
+                + "\"fields\": [\n"
+                + "\"city\"\n"
+                + "]\n"
+                + "}");
+    }
+
     protected static void initVertex() {
         String path = URL_PREFIX + GRAPH_VERTEX;
 
@@ -422,15 +436,32 @@ protected static String assertResponseStatus(int status,
         return content;
     }
 
-    public static Object assertJsonContains(String response, String key) {
+    public static <T> T assertJsonContains(String response, String key) {
         Map<?, ?> json = JsonUtil.fromJson(response, Map.class);
         return assertMapContains(json, key);
     }
 
-    public static Object assertMapContains(Map<?, ?> map, String key) {
+    @SuppressWarnings("unchecked")
+    public static <T> T assertMapContains(Map<?, ?> map, String key) {
         String message = String.format("Expect contains key '%s' in %s",
                                        key, map);
         Assert.assertTrue(message, map.containsKey(key));
-        return map.get(key);
+        return (T) map.get(key);
+    }
+
+    @SuppressWarnings("unchecked")
+    public static Map<?, ?> assertArrayContains(List<Map<?, ?>> list,
+                                                String key, Object value) {
+        String message = String.format("Expect contains {'%s':'%s'} in list %s",
+                                       key, value, list);
+        Map<?, ?> found = null;
+        for (Map<?, ?> map : list) {
+            if (map.get(key).equals(value)) {
+                found = map;
+                break;
+            }
+        }
+        Assert.assertTrue(message, found != null);
+        return found;
     }
 }

hugegraph-test/src/main/java/com/baidu/hugegraph/api/TaskApiTest.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * 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 com.baidu.hugegraph.api;
+
+import java.util.List;
+import java.util.Map;
+
+import javax.ws.rs.core.Response;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baidu.hugegraph.testutil.Assert;
+
+import jersey.repackaged.com.google.common.collect.ImmutableList;
+import jersey.repackaged.com.google.common.collect.ImmutableMap;
+
+public class TaskApiTest extends BaseApiTest {
+
+    private static String path = "/graphs/hugegraph/tasks/";
+    private static String rebuildPath =
+            "/graphs/hugegraph/jobs/rebuild/indexlabels/personByCity";
+    private static String personByCity = "personByCity";
+    private static Map<String, Object> personByCityIL = ImmutableMap.of(
+            "name", "personByCity",
+            "base_type", "VERTEX_LABEL",
+            "base_value", "person",
+            "index_type", "SECONDARY",
+            "fields", ImmutableList.of("city"));
+
+    @Before
+    public void prepareSchema() {
+        BaseApiTest.initPropertyKey();
+        BaseApiTest.initVertexLabel();
+        BaseApiTest.initIndexLabel();
+    }
+
+    @Test
+    public void testList() {
+        int taskId = this.rebuild();
+
+        Response r = client().get(path);
+        String content = assertResponseStatus(200, r);
+        List<Map<?, ?>> tasks = assertJsonContains(content, "tasks");
+        assertArrayContains(tasks, "id", taskId);
+
+        this.waitTaskSuccess(taskId);
+        r = client().get(path, ImmutableMap.of("status", "RUNNING"));
+        content = assertResponseStatus(200, r);
+        tasks = assertJsonContains(content, "tasks");
+        Assert.assertTrue(tasks.isEmpty());
+    }
+
+    @Test
+    public void testGet() {
+        int taskId = this.rebuild();
+
+        Response r = client().get(path, String.valueOf(taskId));
+        String content = assertResponseStatus(200, r);
+        assertJsonContains(content, "id");
+    }
+
+    @Test
+    public void testDelete() {
+        int taskId = this.rebuild();
+
+        this.waitTaskSuccess(taskId);
+        Response r = client().delete(path, String.valueOf(taskId));
+        assertResponseStatus(204, r);
+    }
+
+    private int rebuild() {
+        Response r = client().put(rebuildPath, personByCity, personByCityIL);
+        String content = assertResponseStatus(202, r);
+        return assertJsonContains(content, "task_id");
+    }
+
+    private void waitTaskSuccess(int task) {
+        String status;
+        do {
+            Response r = client().get(path, String.valueOf(task));
+            String content = assertResponseStatus(200, r);
+            status = assertJsonContains(content, "task_status");
+        } while (!status.equals("success"));
+    }
+}