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RetryExecutor.java
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RetryExecutor.java
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/*
* Copyright (c) 2020, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.incubator.jpackage.internal;
import java.io.IOException;
import java.util.function.Consumer;
import java.util.function.Supplier;
public final class RetryExecutor {
RetryExecutor() {
setMaxAttemptsCount(5);
setAttemptTimeoutMillis(2 * 1000);
}
RetryExecutor setMaxAttemptsCount(int v) {
attempts = v;
return this;
}
RetryExecutor setAttemptTimeoutMillis(int v) {
timeoutMillis = v;
return this;
}
RetryExecutor setExecutorInitializer(Consumer<Executor> v) {
executorInitializer = v;
return this;
}
void abort() {
aborted = true;
}
boolean isAborted() {
return aborted;
}
static RetryExecutor retryOnKnownErrorMessage(String v) {
RetryExecutor result = new RetryExecutor();
return result.setExecutorInitializer(exec -> {
exec.setOutputConsumer(output -> {
if (!output.anyMatch(v::equals)) {
result.abort();
}
});
});
}
void execute(String cmdline[]) throws IOException {
executeLoop(() -> Executor.of(cmdline));
}
void execute(ProcessBuilder pb) throws IOException {
executeLoop(() -> Executor.of(pb));
}
private void executeLoop(Supplier<Executor> execSupplier) throws IOException {
aborted = false;
for (;;) {
if (aborted) {
break;
}
try {
Executor exec = execSupplier.get();
if (executorInitializer != null) {
executorInitializer.accept(exec);
}
exec.executeExpectSuccess();
break;
} catch (IOException ex) {
if (aborted || (--attempts) <= 0) {
throw ex;
}
}
try {
Thread.sleep(timeoutMillis);
} catch (InterruptedException ex) {
Log.verbose(ex);
throw new RuntimeException(ex);
}
}
}
private Consumer<Executor> executorInitializer;
private boolean aborted;
private int attempts;
private int timeoutMillis;
}