2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2020 Nordix Foundation.
5 * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 * SPDX-License-Identifier: Apache-2.0
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.apex.core.engine.executor.context;
25 import java.util.ArrayList;
26 import java.util.Collections;
27 import java.util.HashMap;
28 import java.util.List;
30 import java.util.Properties;
31 import java.util.TreeMap;
33 import org.onap.policy.apex.context.ContextAlbum;
34 import org.onap.policy.apex.context.ContextRuntimeException;
35 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
36 import org.onap.policy.apex.core.engine.executor.Executor;
37 import org.onap.policy.apex.core.engine.executor.TaskExecutor;
38 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
39 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
40 import org.onap.policy.apex.model.policymodel.concepts.AxTask;
41 import org.onap.policy.apex.model.policymodel.concepts.AxTaskParameter;
42 import org.slf4j.ext.XLogger;
43 import org.slf4j.ext.XLoggerFactory;
46 * Container class for the execution context for Task logic executions in a task being executed in an Apex engine. The
47 * task must have easy access to the task definition, the incoming and outgoing field contexts, as well as the policy,
48 * global, and external context.
50 * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
53 public class TaskExecutionContext extends AbstractExecutionContext {
54 // Logger for task execution
55 private static final XLogger EXECUTION_LOGGER =
56 XLoggerFactory.getXLogger("org.onap.policy.apex.executionlogging.TaskExecutionLogging");
58 // CHECKSTYLE:OFF: checkstyle:VisibilityModifier Logic has access to these field
60 /** A facade to the full task definition for the task logic being executed. */
61 public final AxTaskFacade subject;
64 * The incoming fields from the trigger event for the task. The task logic can access these fields when executing
67 public final Map<String, Object> inFields;
70 * The outgoing fields from the task. The task logic can access and set these fields with its logic. A task outputs
71 * its result using these fields.
73 public final Map<String, Object> outFields;
76 * Logger for task execution, task logic can use this field to access and log to Apex logging.
78 public final XLogger logger = EXECUTION_LOGGER;
80 // CHECKSTYLE:ON: checkstyle:VisibilityModifier
82 // All available context albums
83 private final Map<String, ContextAlbum> context;
85 // The artifact stack of users of this context
86 private final List<AxConcept> usedArtifactStack;
88 // Parameters associated to a task
90 private Map<String, String> parameters = new HashMap<>();
93 * Instantiates a new task execution context.
95 * @param taskExecutor the task executor that requires context
96 * @param executionId the execution ID for the current APEX policy execution instance
97 * @param executionProperties the execution properties for task execution
98 * @param axTask the task definition that is the subject of execution
99 * @param inFields the in fields
100 * @param outFields the out fields
101 * @param internalContext the execution context of the Apex engine in which the task is being executed
103 public TaskExecutionContext(final TaskExecutor taskExecutor, final long executionId,
104 final Properties executionProperties, final AxTask axTask, final Map<String, Object> inFields,
105 final Map<String, Object> outFields, final ApexInternalContext internalContext) {
106 super(executionId, executionProperties);
108 // The subject is the task definition
109 subject = new AxTaskFacade(axTask);
111 // Populate parameters to be accessed in the task logic from the task parameters.
112 populateParameters(axTask.getTaskParameters());
114 // The input and output fields
115 this.inFields = Collections.unmodifiableMap(inFields);
116 this.outFields = outFields;
118 // Set up the context albums for this task
119 context = new TreeMap<>();
120 for (final AxArtifactKey mapKey : subject.task.getContextAlbumReferences()) {
121 context.put(mapKey.getName(), internalContext.getContextAlbums().get(mapKey));
124 // Get the artifact stack of the users of the policy
125 usedArtifactStack = new ArrayList<>();
126 for (Executor<?, ?, ?, ?> parent = taskExecutor.getParent(); parent != null; parent = parent.getParent()) {
127 // Add each parent to the top of the stack
128 usedArtifactStack.add(0, parent.getKey());
131 // Change the stack to an array
132 final AxConcept[] usedArtifactStackArray = usedArtifactStack.toArray(new AxConcept[usedArtifactStack.size()]);
134 // Set the user of the context
135 for (final ContextAlbum contextAlbum : context.values()) {
136 contextAlbum.setUserArtifactStack(usedArtifactStackArray);
141 * Populate parameters to be accessed in the task logic.
143 * @param taskParameters The task parameters
145 private void populateParameters(Map<String, AxTaskParameter> taskParameters) {
146 taskParameters.entrySet().forEach(taskParamEntry -> parameters.put(taskParamEntry.getKey(),
147 taskParamEntry.getValue().getTaskParameterValue()));
151 * Return a context album if it exists in the context definition of this task.
153 * @param contextAlbumName The context album name
154 * @return The context album
155 * @throws ContextRuntimeException if the context album does not exist on the task for this executor
157 public ContextAlbum getContextAlbum(final String contextAlbumName) {
158 // Find the context album
159 final ContextAlbum foundContextAlbum = context.get(contextAlbumName);
161 // Check if the context album exists
162 if (foundContextAlbum != null) {
163 return foundContextAlbum;
165 throw new ContextRuntimeException("cannot find definition of context album \"" + contextAlbumName
166 + "\" on task \"" + subject.getId() + "\"");