1 files changed, 180 insertions, 0 deletions
diff --git a/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java b/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java
new file mode 100644
index 000000000..89c98400e
--- /dev/null
+++ b/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java
@@ -0,0 +1,180 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021-2022 Nordix Foundation.
+ * ================================================================================
+ * Licensed 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.acm.participant.http.main.handler;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.lang.invoke.MethodHandles;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.stream.Collectors;
+import javax.validation.ConstraintViolation;
+import javax.validation.Validation;
+import javax.validation.ValidationException;
+import lombok.Setter;
+import org.apache.commons.lang3.tuple.Pair;
+import org.onap.policy.clamp.acm.participant.http.main.models.ConfigRequest;
+import org.onap.policy.clamp.acm.participant.http.main.webclient.AcHttpClient;
+import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
+import org.onap.policy.clamp.acm.participant.intermediary.api.ParticipantIntermediaryApi;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
+import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessageType;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaNodeTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+
+/**
+ * This class handles implementation of automationCompositionElement updates.
+ */
+@Component
+public class AutomationCompositionElementHandler implements AutomationCompositionElementListener, Closeable {
+
+    private static final Coder CODER = new StandardCoder();
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    private final ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
+
+    private final Map<ToscaConceptIdentifier, Pair<Integer, String>> restResponseMap = new ConcurrentHashMap<>();
+
+    @Setter
+    private ParticipantIntermediaryApi intermediaryApi;
+
+    /**
+     * Handle automationCompositionElement statistics.
+     *
+     * @param automationCompositionElementId automation composition element id
+     */
+    @Override
+    public void handleStatistics(UUID automationCompositionElementId) {
+        // Implementation not needed for http participant
+
+    }
+
+    /**
+     * Handle a automation composition element state change.
+     *
+     * @param automationCompositionElementId the ID of the automation composition element
+     * @param currentState the current state of the automation composition element
+     * @param newState the state to which the automation composition element is changing to
+     * @throws PfModelException in case of a model exception
+     */
+    @Override
+    public void automationCompositionElementStateChange(ToscaConceptIdentifier automationCompositionId,
+        UUID automationCompositionElementId, AutomationCompositionState currentState,
+        AutomationCompositionOrderedState newState) {
+        switch (newState) {
+            case UNINITIALISED:
+                intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                    automationCompositionElementId, newState, AutomationCompositionState.UNINITIALISED,
+                    ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                break;
+            case PASSIVE:
+                intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                    automationCompositionElementId, newState, AutomationCompositionState.PASSIVE,
+                    ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                break;
+            case RUNNING:
+                intermediaryApi.updateAutomationCompositionElementState(automationCompositionId,
+                    automationCompositionElementId, newState, AutomationCompositionState.RUNNING,
+                    ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                break;
+            default:
+                LOGGER.warn("Cannot transition from state {} to state {}", currentState, newState);
+                break;
+        }
+    }
+
+    /**
+     * Callback method to handle an update on a automation composition element.
+     *
+     * @param element the information on the automation composition element
+     * @param nodeTemplate toscaNodeTemplate
+     */
+    @Override
+    public void automationCompositionElementUpdate(ToscaConceptIdentifier automationCompositionId,
+        AutomationCompositionElement element, ToscaNodeTemplate nodeTemplate) {
+        try {
+            var configRequest = CODER.convert(nodeTemplate.getProperties(), ConfigRequest.class);
+            Set<ConstraintViolation<ConfigRequest>> violations =
+                Validation.buildDefaultValidatorFactory().getValidator().validate(configRequest);
+            if (violations.isEmpty()) {
+                invokeHttpClient(configRequest);
+                List<Pair<Integer, String>> failedResponseStatus = restResponseMap.values().stream()
+                        .filter(response -> !HttpStatus.valueOf(response.getKey())
+                        .is2xxSuccessful()).collect(Collectors.toList());
+                if (failedResponseStatus.isEmpty()) {
+                    intermediaryApi.updateAutomationCompositionElementState(automationCompositionId, element.getId(),
+                            AutomationCompositionOrderedState.PASSIVE, AutomationCompositionState.PASSIVE,
+                            ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
+                } else {
+                    LOGGER.error("Error on Invoking the http request: {}", failedResponseStatus);
+                }
+            } else {
+                LOGGER.error("Violations found in the config request parameters: {}", violations);
+                throw new ValidationException("Constraint violations in the config request");
+            }
+        } catch (CoderException | ValidationException | InterruptedException | ExecutionException e) {
+            LOGGER.error("Error invoking the http request for the config ", e);
+        }
+    }
+
+    /**
+     * Invoke a runnable thread to execute http requests.
+     *
+     * @param configRequest ConfigRequest
+     */
+    public void invokeHttpClient(ConfigRequest configRequest) throws ExecutionException, InterruptedException {
+        // Invoke runnable thread to execute https requests of all config entities
+        Future<Map> result = executor.submit(new AcHttpClient(configRequest, restResponseMap), restResponseMap);
+        if (!result.get().isEmpty()) {
+            LOGGER.debug("Http Request Completed: {}", result.isDone());
+        }
+    }
+
+    /**
+     * Closes this stream and releases any system resources associated
+     * with it. If the stream is already closed then invoking this
+     * method has no effect.
+     *
+     * @throws IOException if an I/O error occurs
+     */
+    @Override
+    public void close() throws IOException {
+        executor.shutdown();
+    }
+}