1 files changed, 91 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/inventory/clients/DatabusControllerClient.java b/src/main/java/org/onap/dcae/inventory/clients/DatabusControllerClient.java
new file mode 100644
index 0000000..b2429d9
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+++ b/src/main/java/org/onap/dcae/inventory/clients/DatabusControllerClient.java
@@ -0,0 +1,91 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * dcae-inventory
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dcae.inventory.clients;
+
+import org.onap.dcae.inventory.InventoryConfiguration;
+import org.onap.dcae.inventory.exceptions.DatabusControllerClientException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.UriBuilder;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.util.Map;
+
+/**
+ * Created by mhwang on 5/25/16.
+ */
+public class DatabusControllerClient {
+
+    private final Client client;
+    private final InventoryConfiguration.DatabusControllerConnectionConfiguration connectionConfiguration;
+
+    public URI constructResourceURI(String resourcePath) {
+        // Make sure that the resource path has a "/" because the UriBuilder sucks and doesn't do it for us.
+        if (resourcePath.charAt(0) != '/') {
+            resourcePath = (new StringBuilder("/")).append(resourcePath).toString();
+        }
+
+        return UriBuilder.fromPath(resourcePath).scheme("https").host(this.connectionConfiguration.getHost())
+                .port(this.connectionConfiguration.getPort()).build();
+    }
+
+    // TODO: Actually model the JSON objects so that they can be returned to be used for providing useful information
+    // and thus change this to a "get".
+    public boolean isExists(String componentId) throws DatabusControllerClientException {
+        URI uri = constructResourceURI(componentId);
+
+        Response response = client.target(uri).request(MediaType.APPLICATION_JSON_TYPE)
+                .header("Content-Type", "application/json").get();
+
+        if (response.getStatus() == 200) {
+            ObjectMapper om = new ObjectMapper();
+
+            try {
+                Map<String, Object> entity = om.readValue((InputStream) response.getEntity(),
+                        new TypeReference<Map<String, Object>>() {});
+
+                return (entity != null && entity.size() > 0) ? true : false;
+            } catch (IOException e) {
+                throw new DatabusControllerClientException(e);
+            }
+        } else if (response.getStatus() == 401) {
+            // You probably got this because your mech id/password is not authorized
+            throw new DatabusControllerClientException(String.format("Check the mech id/password: %d", response.getStatus()));
+        } else if (response.getStatus() == 403) {
+            throw new DatabusControllerClientException(String.format("Credentials not authorized: %d", response.getStatus()));
+        }
+
+        throw new DatabusControllerClientException(String.format("Unexpected error from databus controller: %d",
+                response.getStatus()));
+    }
+
+    public DatabusControllerClient(Client client,
+                                   InventoryConfiguration.DatabusControllerConnectionConfiguration connectionConfiguration) {
+        this.client = client;
+        this.connectionConfiguration = connectionConfiguration;
+    }
+
+}