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Extract SpringApplicationRunListeners 

Extract `SpringApplicationRunListeners` class from `SpringApplication`
to simplify the `run` method.

Closes gh-3079
This commit is contained in:
Phillip Webb 2015-05-29 23:48:03 -07:00
parent e5f111100a
commit 373338124d
2 changed files with 159 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

145
spring-boot/src/main/java/org/springframework/boot/SpringApplication.java
View File

@ -267,62 +267,11 @@ public class SpringApplication {
StopWatch stopWatch = new StopWatch();
stopWatch.start();
ConfigurableApplicationContext context = null;
System.setProperty(
SYSTEM_PROPERTY_JAVA_AWT_HEADLESS,
System.getProperty(SYSTEM_PROPERTY_JAVA_AWT_HEADLESS,
Boolean.toString(this.headless)));
Collection<SpringApplicationRunListener> runListeners = getRunListeners(args);
for (SpringApplicationRunListener runListener : runListeners) {
runListener.started();
}
configureHeadlessProperty();
SpringApplicationRunListeners listeners = getRunListeners(args);
listeners.started();
try {
// Create and configure the environment
ConfigurableEnvironment environment = getOrCreateEnvironment();
configureEnvironment(environment, args);
for (SpringApplicationRunListener runListener : runListeners) {
runListener.environmentPrepared(environment);
}
if (this.showBanner) {
printBanner(environment);
}
// Create, load, refresh and run the ApplicationContext
context = createApplicationContext();
if (this.registerShutdownHook) {
try {
context.registerShutdownHook();
}
catch (AccessControlException ex) {
// Not allowed in some environments.
}
}
context.setEnvironment(environment);
postProcessApplicationContext(context);
applyInitializers(context);
for (SpringApplicationRunListener runListener : runListeners) {
runListener.contextPrepared(context);
}
if (this.logStartupInfo) {
logStartupInfo(context.getParent() == null);
}
// Load the sources
Set<Object> sources = getSources();
Assert.notEmpty(sources, "Sources must not be empty");
load(context, sources.toArray(new Object[sources.size()]));
for (SpringApplicationRunListener runListener : runListeners) {
runListener.contextLoaded(context);
}
// Refresh the context
refresh(context);
afterRefresh(context, args);
for (SpringApplicationRunListener runListener : runListeners) {
runListener.finished(context, null);
}
context = doRun(listeners, args);
stopWatch.stop();
if (this.logStartupInfo) {
@ -333,9 +282,7 @@ public class SpringApplication {
}
catch (Throwable ex) {
try {
for (SpringApplicationRunListener runListener : runListeners) {
finishWithException(runListener, context, ex);
}
listeners.finished(context, ex);
this.log.error("Application startup failed", ex);
}
finally {
@ -348,11 +295,64 @@ public class SpringApplication {
}
}
private Collection<SpringApplicationRunListener> getRunListeners(String[] args) {
List<SpringApplicationRunListener> listeners = new ArrayList<SpringApplicationRunListener>();
listeners.addAll(getSpringFactoriesInstances(SpringApplicationRunListener.class,
new Class<?>[] { SpringApplication.class, String[].class }, this, args));
return listeners;
/**
* @param listeners
* @param args
* @return
*/
private ConfigurableApplicationContext doRun(SpringApplicationRunListeners listeners,
String... args) {
ConfigurableApplicationContext context;
// Create and configure the environment
ConfigurableEnvironment environment = getOrCreateEnvironment();
configureEnvironment(environment, args);
listeners.environmentPrepared(environment);
if (this.showBanner) {
printBanner(environment);
}
// Create, load, refresh and run the ApplicationContext
context = createApplicationContext();
if (this.registerShutdownHook) {
try {
context.registerShutdownHook();
}
catch (AccessControlException ex) {
// Not allowed in some environments.
}
}
context.setEnvironment(environment);
postProcessApplicationContext(context);
applyInitializers(context);
listeners.contextPrepared(context);
if (this.logStartupInfo) {
logStartupInfo(context.getParent() == null);
}
// Load the sources
Set<Object> sources = getSources();
Assert.notEmpty(sources, "Sources must not be empty");
load(context, sources.toArray(new Object[sources.size()]));
listeners.contextLoaded(context);
// Refresh the context
refresh(context);
afterRefresh(context, args);
listeners.finished(context, null);
return context;
}
private void configureHeadlessProperty() {
System.setProperty(
SYSTEM_PROPERTY_JAVA_AWT_HEADLESS,
System.getProperty(SYSTEM_PROPERTY_JAVA_AWT_HEADLESS,
Boolean.toString(this.headless)));
}
private SpringApplicationRunListeners getRunListeners(String[] args) {
Class<?>[] types = new Class<?>[] { SpringApplication.class, String[].class };
return new SpringApplicationRunListeners(this.log, getSpringFactoriesInstances(
SpringApplicationRunListener.class, types, this, args));
}
private <T> Collection<? extends T> getSpringFactoriesInstances(Class<T> type) {
@ -682,23 +682,6 @@ public class SpringApplication {
runCommandLineRunners(context, args);
}
private void finishWithException(SpringApplicationRunListener runListener,
ConfigurableApplicationContext context, Throwable exception) {
try {
runListener.finished(context, exception);
}
catch (Exception ex) {
if (this.log.isDebugEnabled()) {
this.log.error("Error handling failed", ex);
}
else {
String message = ex.getMessage();
message = (message == null ? "no error message" : message);
this.log.warn("Error handling failed (" + message + ")");
}
}
}
/**
* Set a specific main application class that will be used as a log source and to
* obtain version information. By default the main application class will be deduced.
@ -758,7 +741,7 @@ public class SpringApplication {
/**
* Sets if the application information should be logged when the application starts.
* Defaults to {@code true}
* Defaults to {@code true}.
* @param logStartupInfo if startup info should be logged.
*/
public void setLogStartupInfo(boolean logStartupInfo) {

95
spring-boot/src/main/java/org/springframework/boot/SpringApplicationRunListeners.java Normal file
View File

@ -0,0 +1,95 @@
/*
* Copyright 2012-2015 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
*
* http://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.boot;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.commons.logging.Log;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.util.ReflectionUtils;
/**
* A collection of {@link SpringApplicationRunListener}.
*
* @author Phillip Webb
*/
class SpringApplicationRunListeners {
private final Log log;
private final List<SpringApplicationRunListener> listeners;
public SpringApplicationRunListeners(Log log,
Collection<? extends SpringApplicationRunListener> listeners) {
this.log = log;
this.listeners = new ArrayList<SpringApplicationRunListener>(listeners);
}
public void started() {
for (SpringApplicationRunListener listener : this.listeners) {
listener.started();
}
}
public void environmentPrepared(ConfigurableEnvironment environment) {
for (SpringApplicationRunListener listener : this.listeners) {
listener.environmentPrepared(environment);
}
}
public void contextPrepared(ConfigurableApplicationContext context) {
for (SpringApplicationRunListener listener : this.listeners) {
listener.contextPrepared(context);
}
}
public void contextLoaded(ConfigurableApplicationContext context) {
for (SpringApplicationRunListener listener : this.listeners) {
listener.contextLoaded(context);
}
}
public void finished(ConfigurableApplicationContext context, Throwable exception) {
for (SpringApplicationRunListener listener : this.listeners) {
callFinishedListener(listener, context, exception);
}
}
private void callFinishedListener(SpringApplicationRunListener listener,
ConfigurableApplicationContext context, Throwable exception) {
try {
listener.finished(context, exception);
}
catch (Throwable ex) {
if (exception == null) {
ReflectionUtils.rethrowRuntimeException(ex);
}
if (this.log.isDebugEnabled()) {
this.log.error("Error handling failed", ex);
}
else {
String message = ex.getMessage();
message = (message == null ? "no error message" : message);
this.log.warn("Error handling failed (" + message + ")");
}
}
}
}