1 files changed, 74 insertions, 0 deletions
diff --git a/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckProvider.java b/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckProvider.java
new file mode 100644
index 00000000..12470b14
--- /dev/null
+++ b/main/src/main/java/org/onap/policy/pap/main/rest/PdpGroupHealthCheckProvider.java
@@ -0,0 +1,74 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 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.pap.main.rest;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.ws.rs.core.Response;
+
+import org.apache.commons.lang3.tuple.Pair;
+import org.onap.policy.common.utils.services.Registry;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.pdp.concepts.Pdp;
+import org.onap.policy.models.pdp.concepts.PdpGroup;
+import org.onap.policy.models.pdp.concepts.PdpSubGroup;
+import org.onap.policy.models.pdp.concepts.Pdps;
+import org.onap.policy.models.provider.PolicyModelsProvider;
+import org.onap.policy.pap.main.PapConstants;
+import org.onap.policy.pap.main.PolicyModelsProviderFactoryWrapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provider for PAP component to to fetch health status of all PDPs registered with PAP.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class PdpGroupHealthCheckProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(PdpGroupHealthCheckProvider.class);
+
+    /**
+     * Returns health status of all PDPs.
+     *
+     * @return a pair containing the status and the response
+     * @throws PfModelException in case of errors
+     */
+    public Pair<Response.Status, Pdps> fetchPdpGroupHealthStatus() throws PfModelException {
+
+        final Pdps pdps = new Pdps();
+        final PolicyModelsProviderFactoryWrapper modelProviderWrapper =
+                Registry.get(PapConstants.REG_PAP_DAO_FACTORY, PolicyModelsProviderFactoryWrapper.class);
+        try (PolicyModelsProvider databaseProvider = modelProviderWrapper.create()) {
+            final List<PdpGroup> groups = databaseProvider.getPdpGroups(null);
+            final List<Pdp> pdpList = new ArrayList<>();
+            for (final PdpGroup group : groups) {
+                for (final PdpSubGroup subGroup : group.getPdpSubgroups()) {
+                    pdpList.addAll(subGroup.getPdpInstances());
+                }
+            }
+            pdps.setPdpList(pdpList);
+        }
+        LOGGER.debug("PdpGroup HealthCheck Response - {}", pdps);
+        return Pair.of(Response.Status.OK, pdps);
+    }
+}