Add Instantiation Provider

Issue-ID: POLICY-2980
Signed-off-by: FrancescoFioraEst <francesco.fiora@est.tech>
Change-Id: I957f947ece23fbd5f1745e18f909754c5945f465

1 files changed, 188 insertions, 0 deletions

diff --git a/tosca-controlloop/runtime/src/main/java/org/onap/policy/clamp/controlloop/runtime/instantiation/ControlLoopInstantiationProvider.java b/tosca-controlloop/runtime/src/main/java/org/onap/policy/clamp/controlloop/runtime/instantiation/ControlLoopInstantiationProvider.java
new file mode 100644
index 000000000..7586a692c
--- /dev/null
+++ b/tosca-controlloop/runtime/src/main/java/org/onap/policy/clamp/controlloop/runtime/instantiation/ControlLoopInstantiationProvider.java
@@ -0,0 +1,188 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2021 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.controlloop.runtime.instantiation;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoop;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopState;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoops;
+import org.onap.policy.clamp.controlloop.models.controlloop.persistence.provider.ControlLoopProvider;
+import org.onap.policy.clamp.controlloop.models.messages.rest.instantiation.InstantiationCommand;
+import org.onap.policy.clamp.controlloop.models.messages.rest.instantiation.InstantiationResponse;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.base.PfModelRuntimeException;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+
+/**
+ * This class is dedicated to the Instantiation of Commissioned control loop.
+ */
+public class ControlLoopInstantiationProvider implements Closeable {
+    private final ControlLoopProvider controlLoopProvider;
+
+    private static final Object lockit = new Object();
+
+    /**
+     * Create a instantiation provider.
+     *
+     * @param databaseProviderParameters the parameters for database access
+     */
+    public ControlLoopInstantiationProvider(PolicyModelsProviderParameters databaseProviderParameters) {
+        try {
+            controlLoopProvider = new ControlLoopProvider(databaseProviderParameters);
+        } catch (PfModelException e) {
+            throw new PfModelRuntimeException(e);
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        controlLoopProvider.close();
+    }
+
+    /**
+     * Create control loops.
+     *
+     * @param controlLoops the control loop
+     * @return the result of the instantiation operation
+     * @throws PfModelException on creation errors
+     */
+    public InstantiationResponse createControlLoops(ControlLoops controlLoops) throws PfModelException {
+
+        synchronized (lockit) {
+            for (ControlLoop controlLoop : controlLoops.getControlLoopList()) {
+                ControlLoop checkControlLoop = controlLoopProvider.getControlLoop(controlLoop.getKey().asIdentifier());
+                if (checkControlLoop != null) {
+                    throw new PfModelException(Response.Status.BAD_REQUEST,
+                            controlLoop.getKey().asIdentifier() + " already defined");
+                }
+            }
+            controlLoopProvider.createControlLoops(controlLoops.getControlLoopList());
+        }
+
+        InstantiationResponse response = new InstantiationResponse();
+        response.setAffectedControlLoops(controlLoops.getControlLoopList().stream()
+                .map(cl -> cl.getKey().asIdentifier()).collect(Collectors.toList()));
+
+        return response;
+    }
+
+    /**
+     * Update control loops.
+     *
+     * @param controlLoops the control loop
+     * @return the result of the instantiation operation
+     * @throws PfModelException on update errors
+     */
+    public InstantiationResponse updateControlLoops(ControlLoops controlLoops) throws PfModelException {
+        synchronized (lockit) {
+            controlLoopProvider.updateControlLoops(controlLoops.getControlLoopList());
+        }
+
+        InstantiationResponse response = new InstantiationResponse();
+        response.setAffectedControlLoops(controlLoops.getControlLoopList().stream()
+                .map(cl -> cl.getKey().asIdentifier()).collect(Collectors.toList()));
+
+        return response;
+    }
+
+    /**
+     * Delete the control loop with the given name and version.
+     *
+     * @param name the name of the control loop to delete
+     * @param version the version of the control loop to delete
+     * @return the result of the deletion
+     * @throws PfModelException on deletion errors
+     */
+    public InstantiationResponse deleteControlLoop(String name, String version) throws PfModelException {
+        InstantiationResponse response = new InstantiationResponse();
+        synchronized (lockit) {
+            List<ControlLoop> controlLoops = controlLoopProvider.getControlLoops(name, version);
+            if (controlLoops.isEmpty()) {
+                throw new PfModelException(Response.Status.NOT_FOUND, "Control Loop not found");
+            }
+            for (ControlLoop controlLoop : controlLoops) {
+                if (!ControlLoopState.UNINITIALISED.equals(controlLoop.getState())) {
+                    throw new PfModelException(Response.Status.BAD_REQUEST,
+                            "Control Loop State is still " + controlLoop.getState());
+                }
+            }
+
+            response.setAffectedControlLoops(Collections
+                    .singletonList(controlLoopProvider.deleteControlLoop(name, version).getKey().asIdentifier()));
+        }
+        return response;
+    }
+
+    /**
+     * Get the requested control loops.
+     *
+     * @param name the name of the control loop to get, null for all control loops
+     * @param version the version of the control loop to get, null for all control loops
+     * @return the control loops
+     * @throws PfModelException on errors getting control loops
+     */
+    public ControlLoops getControlLoops(String name, String version) throws PfModelException {
+        ControlLoops controlLoops = new ControlLoops();
+        controlLoops.setControlLoopList(controlLoopProvider.getControlLoops(name, version));
+
+        return controlLoops;
+    }
+
+    /**
+     * Issue a command to control loops, setting their ordered state.
+     *
+     * @param command the command to issue to control loops
+     * @return the result of the initiation command
+     * @throws PfModelException on errors setting the ordered state on the control loops
+     * @throws ControlLoopException on ordered state invalid
+     */
+    public InstantiationResponse issueControlLoopCommand(InstantiationCommand command)
+            throws ControlLoopException, PfModelException {
+
+        if (command.getOrderedState() == null) {
+            throw new ControlLoopException(Status.BAD_REQUEST, "ordered state invalid or not specified on command");
+        }
+
+        synchronized (lockit) {
+            List<ControlLoop> controlLoops = new ArrayList<>(command.getControlLoopIdentifierList().size());
+            for (ToscaConceptIdentifier id : command.getControlLoopIdentifierList()) {
+                ControlLoop controlLoop = controlLoopProvider.getControlLoop(id);
+                controlLoop.setCascadedOrderedState(command.getOrderedState());
+                controlLoops.add(controlLoop);
+            }
+            controlLoopProvider.updateControlLoops(controlLoops);
+        }
+
+        InstantiationResponse response = new InstantiationResponse();
+        response.setAffectedControlLoops(command.getControlLoopIdentifierList());
+
+        return response;
+    }
+}