| /* |
| * 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.hugegraph.api.filter; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| import jakarta.inject.Singleton; |
| import jakarta.ws.rs.ServiceUnavailableException; |
| import jakarta.ws.rs.container.ContainerRequestContext; |
| import jakarta.ws.rs.container.ContainerRequestFilter; |
| import jakarta.ws.rs.container.PreMatching; |
| import jakarta.ws.rs.core.Context; |
| import jakarta.ws.rs.core.PathSegment; |
| import jakarta.ws.rs.ext.Provider; |
| |
| import org.apache.hugegraph.config.HugeConfig; |
| import org.apache.hugegraph.config.ServerOptions; |
| import org.apache.hugegraph.define.WorkLoad; |
| import org.apache.hugegraph.util.Bytes; |
| import org.apache.hugegraph.util.E; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.util.concurrent.RateLimiter; |
| |
| @Provider |
| @Singleton |
| @PreMatching |
| public class LoadDetectFilter implements ContainerRequestFilter { |
| |
| private static final Set<String> WHITE_API_LIST = ImmutableSet.of( |
| "", |
| "apis", |
| "metrics", |
| "versions" |
| ); |
| |
| // Call gc every 30+ seconds if memory is low and request frequently |
| private static final RateLimiter GC_RATE_LIMITER = |
| RateLimiter.create(1.0 / 30); |
| |
| @Context |
| private jakarta.inject.Provider<HugeConfig> configProvider; |
| @Context |
| private jakarta.inject.Provider<WorkLoad> loadProvider; |
| |
| @Override |
| public void filter(ContainerRequestContext context) { |
| if (LoadDetectFilter.isWhiteAPI(context)) { |
| return; |
| } |
| |
| HugeConfig config = this.configProvider.get(); |
| |
| int maxWorkerThreads = config.get(ServerOptions.MAX_WORKER_THREADS); |
| WorkLoad load = this.loadProvider.get(); |
| // There will be a thread doesn't work, dedicated to statistics |
| if (load.incrementAndGet() >= maxWorkerThreads) { |
| throw new ServiceUnavailableException(String.format( |
| "The server is too busy to process the request, " + |
| "you can config %s to adjust it or try again later", |
| ServerOptions.MAX_WORKER_THREADS.name())); |
| } |
| |
| long minFreeMemory = config.get(ServerOptions.MIN_FREE_MEMORY); |
| long allocatedMem = Runtime.getRuntime().totalMemory() - |
| Runtime.getRuntime().freeMemory(); |
| long presumableFreeMem = (Runtime.getRuntime().maxMemory() - |
| allocatedMem) / Bytes.MB; |
| if (presumableFreeMem < minFreeMemory) { |
| gcIfNeeded(); |
| throw new ServiceUnavailableException(String.format( |
| "The server available memory %s(MB) is below than " + |
| "threshold %s(MB) and can't process the request, " + |
| "you can config %s to adjust it or try again later", |
| presumableFreeMem, minFreeMemory, |
| ServerOptions.MIN_FREE_MEMORY.name())); |
| } |
| } |
| |
| public static boolean isWhiteAPI(ContainerRequestContext context) { |
| List<PathSegment> segments = context.getUriInfo().getPathSegments(); |
| E.checkArgument(segments.size() > 0, "Invalid request uri '%s'", |
| context.getUriInfo().getPath()); |
| String rootPath = segments.get(0).getPath(); |
| return WHITE_API_LIST.contains(rootPath); |
| } |
| |
| private static void gcIfNeeded() { |
| if (GC_RATE_LIMITER.tryAcquire(1)) { |
| System.gc(); |
| } |
| } |
| } |