| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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. |
| */ |
| package org.apache.knox.gateway.services.metrics.impl.instr; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import com.codahale.metrics.httpclient.HttpClientMetricNameStrategy; |
| import com.codahale.metrics.httpclient.InstrumentedHttpRequestExecutor; |
| import org.apache.http.Header; |
| import org.apache.http.HttpRequest; |
| import org.apache.http.RequestLine; |
| import org.apache.http.client.utils.URIBuilder; |
| import org.apache.http.impl.client.HttpClientBuilder; |
| import org.apache.knox.gateway.services.metrics.InstrumentationProvider; |
| import org.apache.knox.gateway.services.metrics.MetricsContext; |
| import org.apache.knox.gateway.services.metrics.impl.DefaultMetricsService; |
| |
| import java.net.URISyntaxException; |
| import java.util.Locale; |
| |
| public class InstrHttpClientBuilderProvider implements |
| InstrumentationProvider<HttpClientBuilder> { |
| |
| @Override |
| public HttpClientBuilder getInstrumented(MetricsContext metricsContext) { |
| MetricRegistry registry = (MetricRegistry) metricsContext.getProperty(DefaultMetricsService.METRICS_REGISTRY); |
| return HttpClientBuilder.create().setRequestExecutor(new InstrumentedHttpRequestExecutor(registry, TOPOLOGY_URL_AND_METHOD)); |
| } |
| |
| @Override |
| public HttpClientBuilder getInstrumented(HttpClientBuilder instanceClass, MetricsContext metricsContext) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| private static final HttpClientMetricNameStrategy TOPOLOGY_URL_AND_METHOD = new HttpClientMetricNameStrategy() { |
| @Override |
| public String getNameFor(String name, HttpRequest request) { |
| try { |
| String context = ""; |
| Header header = request.getFirstHeader("X-Forwarded-Context"); |
| if (header != null) { |
| context = header.getValue(); |
| } |
| RequestLine requestLine = request.getRequestLine(); |
| URIBuilder uriBuilder = new URIBuilder(requestLine.getUri()); |
| String resourcePath = InstrUtils.getResourcePath(uriBuilder.removeQuery().build().toString()); |
| return MetricRegistry.name("service", name, context + resourcePath, methodNameString(request)); |
| } catch (URISyntaxException e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| |
| private String methodNameString(HttpRequest request) { |
| return request.getRequestLine().getMethod().toLowerCase(Locale.ROOT) + "-requests"; |
| } |
| }; |
| } |