--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.service/src/jdk/vm/ci/service/Services.java 2016-01-12 10:35:24.000000000 +0100 +++ /dev/null 2016-01-12 10:35:24.000000000 +0100 @@ -1,76 +0,0 @@ -/* - * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ -package jdk.vm.ci.service; - -import java.util.Formatter; -import java.util.Iterator; -import java.util.ServiceConfigurationError; -import java.util.ServiceLoader; - -/** - * A mechanism for accessing service providers via JVMCI. - */ -public final class Services { - - private Services() { - } - - /** - * Gets an {@link Iterable} of the JVMCI providers available for a given service. - */ - public static Iterable load(Class service) { - return ServiceLoader.load(service); - } - - /** - * Gets the JVMCI provider for a given service for which at most one provider must be available. - * - * @param service the service whose provider is being requested - * @param required specifies if an {@link InternalError} should be thrown if no provider of - * {@code service} is available - */ - public static S loadSingle(Class service, boolean required) { - Iterable providers = ServiceLoader.load(service); - S singleProvider = null; - try { - for (Iterator it = providers.iterator(); it.hasNext();) { - singleProvider = it.next(); - if (it.hasNext()) { - throw new InternalError(String.format("Multiple %s providers found", service.getName())); - } - } - } catch (ServiceConfigurationError e) { - // If the service is required we will bail out below. - } - if (singleProvider == null && required) { - String javaHome = System.getProperty("java.home"); - String vmName = System.getProperty("java.vm.name"); - Formatter errorMessage = new Formatter(); - errorMessage.format("The VM does not expose required service %s.%n", service.getName()); - errorMessage.format("Currently used Java home directory is %s.%n", javaHome); - errorMessage.format("Currently used VM configuration is: %s", vmName); - throw new UnsupportedOperationException(errorMessage.toString()); - } - return singleProvider; - } -}