| package org.apache.helix.rest.client; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.common.annotations.VisibleForTesting; |
| import org.apache.http.HttpEntity; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.HttpStatus; |
| import org.apache.http.client.ClientProtocolException; |
| import org.apache.http.client.HttpClient; |
| import org.apache.http.client.methods.HttpPost; |
| import org.apache.http.entity.ContentType; |
| import org.apache.http.entity.StringEntity; |
| import org.apache.http.util.EntityUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| class CustomRestClientImpl implements CustomRestClient { |
| private static final Logger LOG = LoggerFactory.getLogger(CustomRestClientImpl.class); |
| |
| // postfix used to append at the end of base url |
| private static final String INSTANCE_HEALTH_STATUS = "/instanceHealthStatus"; |
| private static final String PARTITION_HEALTH_STATUS = "/partitionHealthStatus"; |
| |
| private static final String IS_HEALTHY_FIELD = "IS_HEALTHY"; |
| private static final String PARTITIONS = "partitions"; |
| private static final String ACCEPT_CONTENT_TYPE = "application/json"; |
| private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper(); |
| |
| private HttpClient _httpClient; |
| |
| private interface JsonConverter { |
| Map<String, Boolean> convert(JsonNode jsonNode); |
| } |
| |
| public CustomRestClientImpl(HttpClient httpClient) { |
| _httpClient = httpClient; |
| } |
| |
| @Override |
| public Map<String, Boolean> getInstanceStoppableCheck(String baseUrl, |
| Map<String, String> customPayloads) throws IOException { |
| // example url: http://<baseUrl>/instanceHealthStatus, assuming the base url already directly |
| // queries at the instance |
| String url = baseUrl + INSTANCE_HEALTH_STATUS; |
| JsonConverter jsonConverter = jsonNode -> { |
| Map<String, Boolean> result = new HashMap<>(); |
| jsonNode.fields().forEachRemaining(kv -> result.put(kv.getKey(), kv.getValue().asBoolean())); |
| return result; |
| }; |
| return handleResponse(post(url, Collections.unmodifiableMap(customPayloads)), jsonConverter); |
| } |
| |
| @Override |
| public Map<String, Boolean> getPartitionStoppableCheck(String baseUrl, List<String> partitions, |
| Map<String, String> customPayloads) throws IOException { |
| /* |
| * example url: http://<baseUrl>/partitionHealthStatus -d { |
| * "partitions" : ["p1", "p3", "p9"], |
| * "<key>": "<value>", |
| * ... |
| * } |
| */ |
| String url = baseUrl + PARTITION_HEALTH_STATUS; |
| // To avoid ImmutableMap as parameter |
| Map<String, Object> payLoads = new HashMap<>(customPayloads); |
| // Add the entry: "partitions" : ["p1", "p3", "p9"] |
| if (partitions != null) { |
| payLoads.put(PARTITIONS, partitions); |
| } |
| JsonConverter jsonConverter = jsonNode -> { |
| Map<String, Boolean> result = new HashMap<>(); |
| jsonNode.fields().forEachRemaining( |
| kv -> result.put(kv.getKey(), kv.getValue().get(IS_HEALTHY_FIELD).asBoolean())); |
| return result; |
| }; |
| return handleResponse(post(url, payLoads), jsonConverter); |
| } |
| |
| @VisibleForTesting |
| protected JsonNode getJsonObject(HttpResponse httpResponse) throws IOException { |
| HttpEntity httpEntity = httpResponse.getEntity(); |
| String str = EntityUtils.toString(httpEntity); |
| LOG.info("Converting Response Content {} to JsonNode", str); |
| return OBJECT_MAPPER.readTree(str); |
| } |
| |
| private Map<String, Boolean> handleResponse(HttpResponse httpResponse, |
| JsonConverter jsonConverter) throws IOException { |
| int status = httpResponse.getStatusLine().getStatusCode(); |
| if (status == HttpStatus.SC_OK) { |
| LOG.info("Expected HttpResponse statusCode: {}", HttpStatus.SC_OK); |
| return jsonConverter.convert(getJsonObject(httpResponse)); |
| } else { |
| // Ensure entity is fully consumed so stream is closed. |
| EntityUtils.consumeQuietly(httpResponse.getEntity()); |
| throw new ClientProtocolException("Unexpected response status: " + status + ", reason: " |
| + httpResponse.getStatusLine().getReasonPhrase()); |
| } |
| } |
| |
| @VisibleForTesting |
| protected HttpResponse post(String url, Map<String, Object> payloads) throws IOException { |
| HttpPost postRequest = new HttpPost(url); |
| try { |
| postRequest.setHeader("Accept", ACCEPT_CONTENT_TYPE); |
| StringEntity entity = new StringEntity(OBJECT_MAPPER.writeValueAsString(payloads), |
| ContentType.APPLICATION_JSON); |
| postRequest.setEntity(entity); |
| LOG.info("Executing request: {}, headers: {}, entity: {}", postRequest.getRequestLine(), |
| postRequest.getAllHeaders(), postRequest.getEntity()); |
| |
| HttpResponse response = _httpClient.execute(postRequest); |
| int status = response.getStatusLine().getStatusCode(); |
| if (status != HttpStatus.SC_OK) { |
| LOG.warn("Received non-200 status code: {}, payloads: {}", status, payloads); |
| } |
| |
| return response; |
| } catch (IOException e) { |
| // Release connection to be reused and avoid connection leakage. |
| postRequest.releaseConnection(); |
| throw e; |
| } |
| } |
| } |