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Retry when findAvailableTcpPort returns an unavailable port

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Closes gh-19801
This commit is contained in:
Andy Wilkinson 2020-01-18 12:23:44 +00:00
parent aeca44d3d7
commit bfdb49f2a2
1 changed files with 22 additions and 8 deletions
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30
spring-boot-project/spring-boot/src/test/java/org/springframework/boot/rsocket/netty/NettyRSocketServerFactoryTests.java
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@ -1,5 +1,5 @@
/*
* Copyright 2012-2019 the original author or authors.
* Copyright 2012-2020 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.
@ -19,6 +19,7 @@ package org.springframework.boot.rsocket.netty;
import java.net.InetSocketAddress;
import java.time.Duration;
import java.util.Arrays;
import java.util.concurrent.Callable;
import io.netty.buffer.PooledByteBufAllocator;
import io.rsocket.AbstractRSocket;
@ -87,10 +88,13 @@ class NettyRSocketServerFactoryTests {
@Test
void specificPort() {
NettyRSocketServerFactory factory = getFactory();
int specificPort = SocketUtils.findAvailableTcpPort(41000);
factory.setPort(specificPort);
this.server = factory.create(new EchoRequestResponseAcceptor());
this.server.start();
int specificPort = doWithRetry(() -> {
int port = SocketUtils.findAvailableTcpPort(41000);
factory.setPort(port);
this.server = factory.create(new EchoRequestResponseAcceptor());
this.server.start();
return port;
});
this.requester = createRSocketTcpClient();
String payload = "test payload";
String response = this.requester.route("test").data(payload).retrieveMono(String.class).block(TIMEOUT);
@ -117,15 +121,12 @@ class NettyRSocketServerFactoryTests {
ReactorResourceFactory resourceFactory = new ReactorResourceFactory();
resourceFactory.afterPropertiesSet();
factory.setResourceFactory(resourceFactory);
int specificPort = SocketUtils.findAvailableTcpPort(41000);
factory.setPort(specificPort);
this.server = factory.create(new EchoRequestResponseAcceptor());
this.server.start();
this.requester = createRSocketWebSocketClient();
String payload = "test payload";
String response = this.requester.route("test").data(payload).retrieveMono(String.class).block(TIMEOUT);
assertThat(response).isEqualTo(payload);
assertThat(this.server.address().getPort()).isEqualTo(specificPort);
}
@Test
@ -164,6 +165,19 @@ class NettyRSocketServerFactoryTests {
return RSocketRequester.builder().rsocketStrategies(strategies);
}
private <T> T doWithRetry(Callable<T> action) {
Exception lastFailure = null;
for (int i = 0; i < 10; i++) {
try {
return action.call();
}
catch (Exception ex) {
lastFailure = ex;
}
}
throw new IllegalStateException("Action was not successful in 10 attempts", lastFailure);
}
static class EchoRequestResponseAcceptor implements SocketAcceptor {
@Override