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| 1 | +/* |
| 2 | + * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | + * |
| 5 | + * This code is free software; you can redistribute it and/or modify it |
| 6 | + * under the terms of the GNU General Public License version 2 only, as |
| 7 | + * published by the Free Software Foundation. Oracle designates this |
| 8 | + * particular file as subject to the "Classpath" exception as provided |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. |
| 10 | + * |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | + * accompanied this code). |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU General Public License version |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | + * |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | + * or visit www.oracle.com if you need additional information or have any |
| 23 | + * questions. |
| 24 | + */ |
| 25 | +package jdk.incubator.jpackage.internal; |
| 26 | + |
| 27 | +import java.io.IOException; |
| 28 | +import java.util.function.Consumer; |
| 29 | + |
| 30 | +public final class RetryExecutor { |
| 31 | + RetryExecutor() { |
| 32 | + setMaxAttemptsCount(5); |
| 33 | + setAttemptTimeoutMillis(2 * 1000); |
| 34 | + } |
| 35 | + |
| 36 | + RetryExecutor setMaxAttemptsCount(int v) { |
| 37 | + attempts = v; |
| 38 | + return this; |
| 39 | + } |
| 40 | + |
| 41 | + RetryExecutor setAttemptTimeoutMillis(int v) { |
| 42 | + timeoutMillis = v; |
| 43 | + return this; |
| 44 | + } |
| 45 | + |
| 46 | + RetryExecutor setExecutorInitializer(Consumer<Executor> v) { |
| 47 | + executorInitializer = v; |
| 48 | + return this; |
| 49 | + } |
| 50 | + |
| 51 | + void abort() { |
| 52 | + aborted = true; |
| 53 | + } |
| 54 | + |
| 55 | + static RetryExecutor retryOnKnownErrorMessage(String v) { |
| 56 | + RetryExecutor result = new RetryExecutor(); |
| 57 | + return result.setExecutorInitializer(exec -> { |
| 58 | + exec.setOutputConsumer(output -> { |
| 59 | + if (!output.anyMatch(v::equals)) { |
| 60 | + result.abort(); |
| 61 | + } |
| 62 | + }); |
| 63 | + }); |
| 64 | + } |
| 65 | + |
| 66 | + void execute(String cmdline[]) throws IOException { |
| 67 | + aborted = false; |
| 68 | + for (;;) { |
| 69 | + try { |
| 70 | + Executor exec = Executor.of(cmdline); |
| 71 | + if (executorInitializer != null) { |
| 72 | + executorInitializer.accept(exec); |
| 73 | + } |
| 74 | + exec.executeExpectSuccess(); |
| 75 | + break; |
| 76 | + } catch (IOException ex) { |
| 77 | + if (aborted || (--attempts) <= 0) { |
| 78 | + throw ex; |
| 79 | + } |
| 80 | + } |
| 81 | + |
| 82 | + try { |
| 83 | + Thread.sleep(timeoutMillis); |
| 84 | + } catch (InterruptedException ex) { |
| 85 | + Log.verbose(ex); |
| 86 | + throw new RuntimeException(ex); |
| 87 | + } |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + private Consumer<Executor> executorInitializer; |
| 92 | + private boolean aborted; |
| 93 | + private int attempts; |
| 94 | + private int timeoutMillis; |
| 95 | +} |
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