Add health check to vLBMS

[demo.git] / vnfs / vLBMS / apis / health-vnf-onap-plugin / health-vnf-onap-plugin-impl / src / main / java / org / onap / vnf / health / RESTManager.java

diff --git a/vnfs/vLBMS/apis/health-vnf-onap-plugin/health-vnf-onap-plugin-impl/src/main/java/org/onap/vnf/health/RESTManager.java b/vnfs/vLBMS/apis/health-vnf-onap-plugin/health-vnf-onap-plugin-impl/src/main/java/org/onap/vnf/health/RESTManager.java
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--- /dev/null
+++ b/vnfs/vLBMS/apis/health-vnf-onap-plugin/health-vnf-onap-plugin-impl/src/main/java/org/onap/vnf/health/RESTManager.java
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+/*-
+ * ============LICENSE_START=======================================================
+ *
+ * ================================================================================
+ * 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.vnf.health;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.Map.Entry;
+import org.apache.http.HttpResponse;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.CredentialsProvider;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.conn.ssl.NoopHostnameVerifier;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.BasicCredentialsProvider;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RESTManager {
+
+    private static final Logger logger = LoggerFactory.getLogger(RESTManager.class);
+
+    public class Pair<A, B> {
+        public final A a;
+        public final B b;
+
+        public Pair(A a, B b) {
+            this.a = a;
+            this.b = b;
+        }
+    }
+
+    public Pair<Integer, String> post(String url, String username, String password,
+            Map<String, String> headers, String contentType, String body) {
+        CredentialsProvider credentials = new BasicCredentialsProvider();
+        credentials.setCredentials(AuthScope.ANY,
+                new UsernamePasswordCredentials(username, password));
+
+        logger.debug("HTTP REQUEST: {} -> {} {} -> {}", url, username,
+                ((password != null) ? password.length() : "-"), contentType);
+        if (headers != null) {
+            logger.debug("Headers: ");
+            headers.forEach((name, value) -> logger.debug("{} -> {}", name, value));
+        }
+        logger.debug(body);
+
+        try (CloseableHttpClient client =
+                HttpClientBuilder
+                        .create()
+                        .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
+                        .setDefaultCredentialsProvider(credentials)
+                        .build()) {
+
+            HttpPost post = new HttpPost(url);
+            if (headers != null) {
+                for (Entry<String, String> entry : headers.entrySet()) {
+                    post.addHeader(entry.getKey(), headers.get(entry.getKey()));
+                }
+            }
+            post.addHeader("Content-Type", contentType);
+
+            StringEntity input = new StringEntity(body);
+            input.setContentType(contentType);
+            post.setEntity(input);
+
+            HttpResponse response = client.execute(post);
+            if (response != null) {
+                String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
+                logger.debug("HTTP POST Response Status Code: {}",
+                        response.getStatusLine().getStatusCode());
+                logger.debug("HTTP POST Response Body:");
+                logger.debug(returnBody);
+
+                return new Pair<>(response.getStatusLine().getStatusCode(),
+                        returnBody);
+            }
+            else {
+                logger.error("Response from {} is null", url);
+                return null;
+            }
+        }
+        catch (Exception e) {
+            logger.error("Failed to POST to {}", url, e);
+            return null;
+        }
+    }
+
+    public Pair<Integer, String> get(String url, String username, String password,
+            Map<String, String> headers) {
+
+        CredentialsProvider credentials = new BasicCredentialsProvider();
+        credentials.setCredentials(AuthScope.ANY,
+                new UsernamePasswordCredentials(username, password));
+
+        try (CloseableHttpClient client =
+                HttpClientBuilder
+                        .create()
+                        .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
+                        .setDefaultCredentialsProvider(credentials)
+                        .build()) {
+
+            HttpGet get = new HttpGet(url);
+            if (headers != null) {
+                for (Entry<String, String> entry : headers.entrySet()) {
+                    get.addHeader(entry.getKey(), headers.get(entry.getKey()));
+                }
+            }
+
+            HttpResponse response = client.execute(get);
+
+            String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
+
+            logger.debug("HTTP GET Response Status Code: {}",
+                    response.getStatusLine().getStatusCode());
+            logger.debug("HTTP GET Response Body:");
+            logger.debug(returnBody);
+
+            return new Pair<>(response.getStatusLine().getStatusCode(), returnBody);
+        }
+        catch (IOException e) {
+            logger.error("Failed to GET to {}", url, e);
+            return null;
+        }
+    }
+}