/* * Copyright 2018-2020 the original author or authors. * * 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 * * https://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.springframework.cloud.function.adapter.gcp; import com.google.cloud.functions.Context; import com.google.cloud.functions.HttpFunction; import com.google.cloud.functions.HttpRequest; import com.google.cloud.functions.HttpResponse; import com.google.cloud.functions.RawBackgroundFunction; import org.springframework.boot.loader.JarLauncher; import org.springframework.boot.loader.jar.JarFile; /** * The launcher class written at the top-level of the output JAR to be deployed to * Google Cloud Functions. This is the entry point to the function when run from JAR. * * @author Ray Tsang * @author Daniel Zou */ public class GcfJarLauncher extends JarLauncher implements HttpFunction, RawBackgroundFunction { private final ClassLoader loader; private final Object delegate; public GcfJarLauncher() throws Exception { JarFile.registerUrlProtocolHandler(); this.loader = createClassLoader(getClassPathArchivesIterator()); Class<?> clazz = this.loader .loadClass("org.springframework.cloud.function.adapter.gcp.FunctionInvoker"); this.delegate = clazz.getConstructor().newInstance(); } @Override public void service(HttpRequest httpRequest, HttpResponse httpResponse) throws Exception { Thread.currentThread().setContextClassLoader(this.loader); ((HttpFunction) delegate).service(httpRequest, httpResponse); } @Override public void accept(String json, Context context) { Thread.currentThread().setContextClassLoader(this.loader); ((RawBackgroundFunction) delegate).accept(json, context); } }