2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2020 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.core.engine.executor.context;
24 import java.util.ArrayList;
25 import java.util.List;
27 import java.util.Properties;
28 import java.util.TreeMap;
31 import org.onap.policy.apex.context.ContextAlbum;
32 import org.onap.policy.apex.context.ContextRuntimeException;
33 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
34 import org.onap.policy.apex.core.engine.event.EnEvent;
35 import org.onap.policy.apex.core.engine.executor.Executor;
36 import org.onap.policy.apex.core.engine.executor.TaskSelectExecutor;
37 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
38 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
39 import org.onap.policy.apex.model.policymodel.concepts.AxState;
40 import org.slf4j.ext.XLogger;
41 import org.slf4j.ext.XLoggerFactory;
44 * Container class for the execution context for Task Selection logic executions in a task being executed in an Apex
45 * engine. The task must have easy access to the state definition, the incoming and outgoing event contexts, as well as
46 * the policy, global, and external context.
48 * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
51 public class TaskSelectionExecutionContext extends AbstractExecutionContext {
52 // Logger for task execution
53 private static final XLogger EXECUTION_LOGGER =
54 XLoggerFactory.getXLogger("org.onap.policy.apex.executionlogging.TaskSelectionExecutionLogging");
56 // CHECKSTYLE:OFF: checkstyle:VisibilityModifier Logic has access to these field
58 /** A facade to the full state definition for the task selection logic being executed. */
59 public final AxStateFacade subject;
62 * The incoming fields from the trigger event for the state. The task selection logic can access these fields to
63 * decide what task to select for the state.
65 public final Map<String, Object> inFields;
68 * The task that the task selection logic has selected for a state. The task selection logic sets this field in its
69 * logic prior to executing and the Apex engine executes this task as the task for this state.
71 public final AxArtifactKey selectedTask;
74 * Logger for task selection execution, task selection logic can use this field to access and log to Apex logging.
76 public final XLogger logger = EXECUTION_LOGGER;
78 // CHECKSTYLE:ON: checkstyle:VisibilityModifier
80 // All available context albums
81 private final Map<String, ContextAlbum> context;
84 * Instantiates a new task selection execution context.
86 * @param taskSelectExecutor the task selection executor that requires context
87 * @param executionId the execution identifier
88 * @param axState the state definition that is the subject of execution
89 * @param incomingEvent the incoming event for the state
90 * @param outgoingKey the outgoing key for the task to execute in this state
91 * @param internalContext the execution context of the Apex engine in which the task is being executed
93 public TaskSelectionExecutionContext(final TaskSelectExecutor taskSelectExecutor, final long executionId,
94 final AxState axState, final EnEvent incomingEvent, final AxArtifactKey outgoingKey,
95 final ApexInternalContext internalContext) {
96 super(executionId, incomingEvent.getExecutionProperties());
97 // The subject is the state definition
98 subject = new AxStateFacade(axState);
101 inFields = incomingEvent;
102 selectedTask = outgoingKey;
104 // Set up the context albums for this task
105 // Set up the context albums for this task
106 context = new TreeMap<>();
107 for (final AxArtifactKey mapKey : subject.state.getContextAlbumReferences()) {
108 context.put(mapKey.getName(), internalContext.getContextAlbums().get(mapKey));
111 // Get the artifact stack of the users of the policy
112 final List<AxConcept> usedArtifactStack = new ArrayList<>();
113 for (Executor<?, ?, ?, ?> parent = taskSelectExecutor.getParent(); parent != null; parent =
114 parent.getParent()) {
115 // Add each parent to the top of the stack
116 usedArtifactStack.add(0, parent.getKey());
119 // Add the events to the artifact stack
120 usedArtifactStack.add(incomingEvent.getKey());
122 // Change the stack to an array
123 final AxConcept[] usedArtifactStackArray = usedArtifactStack.toArray(new AxConcept[usedArtifactStack.size()]);
125 // Set the user of the context
126 // Set the user of the context
127 for (final ContextAlbum contextAlbum : context.values()) {
128 contextAlbum.setUserArtifactStack(usedArtifactStackArray);
130 incomingEvent.setUserArtifactStack(usedArtifactStackArray);
134 * Return a context album if it exists in the context definition of this state.
136 * @param contextAlbumName The context album name
137 * @return The context albumxxxxxx
138 * @throws ContextRuntimeException if the context album does not exist on the state for this executor
140 public ContextAlbum getContextAlbum(final String contextAlbumName) {
141 // Find the context album
142 final ContextAlbum foundContextAlbum = context.get(contextAlbumName);
144 // Check if the context album exists
145 if (foundContextAlbum != null) {
146 return foundContextAlbum;
148 throw new ContextRuntimeException("cannot find definition of context album \"" + contextAlbumName
149 + "\" on state \"" + subject.getId() + "\"");