| /* |
| * 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.ignite.events; |
| |
| import java.util.UUID; |
| import org.apache.ignite.cluster.ClusterNode; |
| import org.apache.ignite.internal.processors.security.IgniteSecurity; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.lang.IgniteUuid; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Grid task event. |
| * <p> |
| * Grid events are used for notification about what happens within the grid. Note that by |
| * design Ignite keeps all events generated on the local node locally and it provides |
| * APIs for performing a distributed queries across multiple nodes: |
| * <ul> |
| * <li> |
| * {@link org.apache.ignite.IgniteEvents#remoteQuery(org.apache.ignite.lang.IgnitePredicate, long, int...)} - |
| * asynchronously querying events occurred on the nodes specified, including remote nodes. |
| * </li> |
| * <li> |
| * {@link org.apache.ignite.IgniteEvents#localQuery(org.apache.ignite.lang.IgnitePredicate, int...)} - |
| * querying only local events stored on this local node. |
| * </li> |
| * <li> |
| * {@link org.apache.ignite.IgniteEvents#localListen(org.apache.ignite.lang.IgnitePredicate, int...)} - |
| * listening to local grid events (events from remote nodes not included). |
| * </li> |
| * </ul> |
| * User can also wait for events using method |
| * {@link org.apache.ignite.IgniteEvents#waitForLocal(org.apache.ignite.lang.IgnitePredicate, int...)}. |
| * <h1 class="header">Events and Performance</h1> |
| * Note that by default all events in Ignite are enabled and therefore generated and stored |
| * by whatever event storage SPI is configured. Ignite can and often does generate thousands events per seconds |
| * under the load and therefore it creates a significant additional load on the system. If these events are |
| * not needed by the application this load is unnecessary and leads to significant performance degradation. |
| * <p> |
| * It is <b>highly recommended</b> to enable only those events that your application logic requires |
| * by using {@link org.apache.ignite.configuration.IgniteConfiguration#getIncludeEventTypes()} method in Ignite configuration. |
| * Note that certain events are required for Ignite's internal operations and such events will still be generated but not stored by |
| * event storage SPI if they are disabled in Ignite configuration. |
| * @see EventType#EVT_TASK_FAILED |
| * @see EventType#EVT_TASK_FINISHED |
| * @see EventType#EVT_TASK_REDUCED |
| * @see EventType#EVT_TASK_STARTED |
| * @see EventType#EVT_TASK_SESSION_ATTR_SET |
| * @see EventType#EVT_TASK_TIMEDOUT |
| * @see EventType#EVTS_TASK_EXECUTION |
| */ |
| public class TaskEvent extends EventAdapter { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** */ |
| private final String taskName; |
| |
| /** */ |
| private final String taskClsName; |
| |
| /** */ |
| private final IgniteUuid sesId; |
| |
| /** */ |
| private final boolean internal; |
| |
| /** */ |
| private final UUID subjId; |
| |
| /** {@inheritDoc} */ |
| @Override public String shortDisplay() { |
| return name() + ": taskName=" + taskName; |
| } |
| |
| /** |
| * Creates task event with given parameters. |
| * |
| * @param node Node. |
| * @param msg Optional message. |
| * @param type Event type. |
| * @param sesId Task session ID. |
| * @param taskName Task name. |
| * @param subjId Subject ID. |
| * @param internal Whether current task belongs to Ignite internal tasks. |
| * @param taskClsName Name ot the task class. |
| */ |
| public TaskEvent(ClusterNode node, String msg, int type, IgniteUuid sesId, String taskName, String taskClsName, |
| boolean internal, @Nullable UUID subjId) { |
| super(node, msg, type); |
| |
| this.sesId = sesId; |
| this.taskName = taskName; |
| this.taskClsName = taskClsName; |
| this.internal = internal; |
| this.subjId = subjId; |
| } |
| |
| /** |
| * Gets name of the task that triggered the event. |
| * |
| * @return Name of the task that triggered the event. |
| */ |
| public String taskName() { |
| return taskName; |
| } |
| |
| /** |
| * Gets name of task class that triggered this event. |
| * |
| * @return Name of task class that triggered the event. |
| */ |
| public String taskClassName() { |
| return taskClsName; |
| } |
| |
| /** |
| * Gets session ID of the task that triggered the event. |
| * |
| * @return Session ID of the task that triggered the event. |
| */ |
| public IgniteUuid taskSessionId() { |
| return sesId; |
| } |
| |
| /** |
| * Returns {@code true} if task is created by Ignite and is used for system needs. |
| * |
| * @return {@code True} if task is created by Ignite and is used for system needs. |
| */ |
| public boolean internal() { |
| return internal; |
| } |
| |
| /** |
| * Gets security subject ID initiated this task event, if security is enabled. This property is not available for |
| * {@link EventType#EVT_TASK_SESSION_ATTR_SET} task event. |
| * |
| * @return Subject ID if security is enabled, otherwise null. |
| * @see IgniteSecurity#enabled() |
| */ |
| @Nullable public UUID subjectId() { |
| return subjId; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(TaskEvent.class, this, |
| "nodeId8", U.id8(node().id()), |
| "msg", message(), |
| "type", name(), |
| "tstamp", timestamp()); |
| } |
| } |