| /* |
| * 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. |
| */ |
| |
| package org.apache.solr.util.stats; |
| |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import com.codahale.metrics.Timer; |
| import org.apache.http.HttpClientConnection; |
| import org.apache.http.HttpException; |
| import org.apache.http.HttpRequest; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.RequestLine; |
| import org.apache.http.client.methods.HttpRequestWrapper; |
| import org.apache.http.client.utils.URIBuilder; |
| import org.apache.http.protocol.HttpContext; |
| import org.apache.http.protocol.HttpRequestExecutor; |
| import org.apache.solr.metrics.SolrMetricManager; |
| import org.apache.solr.metrics.SolrMetricProducer; |
| |
| import static org.apache.solr.metrics.SolrMetricManager.mkName; |
| |
| /** |
| * Sub-class of HttpRequestExecutor which tracks metrics interesting to solr |
| * Inspired and partially copied from dropwizard httpclient library |
| */ |
| public class InstrumentedHttpRequestExecutor extends HttpRequestExecutor implements SolrMetricProducer { |
| public static final HttpClientMetricNameStrategy QUERYLESS_URL_AND_METHOD = |
| (scope, request) -> { |
| try { |
| final RequestLine requestLine = request.getRequestLine(); |
| String schemeHostPort = null; |
| if (request instanceof HttpRequestWrapper) { |
| HttpRequestWrapper wrapper = (HttpRequestWrapper) request; |
| if (wrapper.getTarget() != null) { |
| schemeHostPort = wrapper.getTarget().getSchemeName() + "://" + wrapper.getTarget().getHostName() + ":" + wrapper.getTarget().getPort(); |
| } |
| } |
| final URIBuilder url = new URIBuilder(requestLine.getUri()); |
| return mkName((schemeHostPort != null ? schemeHostPort : "") + url.removeQuery().build().toString() + "." + methodNameString(request), scope); |
| } catch (URISyntaxException e) { |
| throw new IllegalArgumentException(e); |
| } |
| }; |
| |
| public static final HttpClientMetricNameStrategy METHOD_ONLY = |
| (scope, request) -> mkName(methodNameString(request), scope); |
| |
| public static final HttpClientMetricNameStrategy HOST_AND_METHOD = |
| (scope, request) -> { |
| try { |
| final RequestLine requestLine = request.getRequestLine(); |
| String schemeHostPort = null; |
| if (request instanceof HttpRequestWrapper) { |
| HttpRequestWrapper wrapper = (HttpRequestWrapper) request; |
| if (wrapper.getTarget() != null) { |
| schemeHostPort = wrapper.getTarget().getSchemeName() + "://" + wrapper.getTarget().getHostName() + ":" + wrapper.getTarget().getPort(); |
| } |
| } |
| final URIBuilder url = new URIBuilder(requestLine.getUri()); |
| return mkName((schemeHostPort != null ? schemeHostPort : "") + "." + methodNameString(request), scope); |
| } catch (URISyntaxException e) { |
| throw new IllegalArgumentException(e); |
| } |
| }; |
| |
| public static final Map<String, HttpClientMetricNameStrategy> KNOWN_METRIC_NAME_STRATEGIES = new HashMap<>(3); |
| |
| static { |
| KNOWN_METRIC_NAME_STRATEGIES.put("queryLessURLAndMethod", QUERYLESS_URL_AND_METHOD); |
| KNOWN_METRIC_NAME_STRATEGIES.put("hostAndMethod", HOST_AND_METHOD); |
| KNOWN_METRIC_NAME_STRATEGIES.put("methodOnly", METHOD_ONLY); |
| } |
| |
| protected MetricRegistry metricsRegistry; |
| protected SolrMetricManager metricManager; |
| protected String registryName; |
| protected String scope; |
| protected HttpClientMetricNameStrategy nameStrategy; |
| |
| public InstrumentedHttpRequestExecutor(int waitForContinue, HttpClientMetricNameStrategy nameStrategy) { |
| super(waitForContinue); |
| this.nameStrategy = nameStrategy; |
| } |
| |
| public InstrumentedHttpRequestExecutor(HttpClientMetricNameStrategy nameStrategy) { |
| this.nameStrategy = nameStrategy; |
| } |
| |
| private static String methodNameString(HttpRequest request) { |
| return request.getRequestLine().getMethod().toLowerCase(Locale.ROOT) + ".requests"; |
| } |
| |
| @Override |
| public HttpResponse execute(HttpRequest request, HttpClientConnection conn, HttpContext context) throws IOException, HttpException { |
| Timer.Context timerContext = null; |
| if (metricsRegistry != null) { |
| timerContext = timer(request).time(); |
| } |
| try { |
| return super.execute(request, conn, context); |
| } finally { |
| if (timerContext != null) { |
| timerContext.stop(); |
| } |
| } |
| } |
| |
| private Timer timer(HttpRequest request) { |
| return metricsRegistry.timer(nameStrategy.getNameFor(scope, request)); |
| } |
| |
| @Override |
| public void initializeMetrics(SolrMetricManager manager, String registry, String tag, String scope) { |
| this.metricManager = manager; |
| this.registryName = registry; |
| this.metricsRegistry = manager.registry(registry); |
| this.scope = scope; |
| } |
| } |