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TestConfigDataBootstrap.java
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TestConfigDataBootstrap.java
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/*
* Copyright 2012-2021 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
*
* https://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.context.config;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.function.Supplier;
import org.springframework.boot.BootstrapContextClosedEvent;
import org.springframework.boot.BootstrapRegistry.InstanceSupplier;
import org.springframework.boot.context.properties.bind.Binder;
import org.springframework.context.ApplicationListener;
import org.springframework.core.env.MapPropertySource;
/**
* Test classes used with
* {@link ConfigDataEnvironmentPostProcessorBootstrapContextIntegrationTests} to show how
* a bootstrap registry can be used. This example will create helper instances during
* result and load. It also shows how the helper can ultimately be registered as a bean.
*
* @author Phillip Webb
*/
class TestConfigDataBootstrap {
static class LocationResolver implements ConfigDataLocationResolver<Resource> {
@Override
public boolean isResolvable(ConfigDataLocationResolverContext context, ConfigDataLocation location) {
context.getBootstrapContext().get(Binder.class); // gh-24559
return location.hasPrefix("testbootstrap:");
}
@Override
public List<Resource> resolve(ConfigDataLocationResolverContext context, ConfigDataLocation location) {
context.getBootstrapContext().registerIfAbsent(ResolverHelper.class,
InstanceSupplier.from(() -> new ResolverHelper(location)));
ResolverHelper helper = context.getBootstrapContext().get(ResolverHelper.class);
return Collections.singletonList(new Resource(helper));
}
}
static class Loader implements ConfigDataLoader<Resource> {
@Override
public ConfigData load(ConfigDataLoaderContext context, Resource location) throws IOException {
context.getBootstrapContext().registerIfAbsent(LoaderHelper.class,
(bootstrapContext) -> new LoaderHelper(location, () -> bootstrapContext.get(Binder.class)));
LoaderHelper helper = context.getBootstrapContext().get(LoaderHelper.class);
context.getBootstrapContext().addCloseListener(helper);
return new ConfigData(
Collections.singleton(new MapPropertySource("loaded", Collections.singletonMap("test", "test"))));
}
}
static class Resource extends ConfigDataResource {
private final ResolverHelper resolverHelper;
Resource(ResolverHelper resolverHelper) {
this.resolverHelper = resolverHelper;
}
@Override
public String toString() {
return "test";
}
ResolverHelper getResolverHelper() {
return this.resolverHelper;
}
}
static class ResolverHelper {
private final ConfigDataLocation location;
ResolverHelper(ConfigDataLocation location) {
this.location = location;
}
ConfigDataLocation getLocation() {
return this.location;
}
}
static class LoaderHelper implements ApplicationListener<BootstrapContextClosedEvent> {
private final Resource location;
private final Supplier<Binder> binder;
LoaderHelper(Resource location, Supplier<Binder> binder) {
this.location = location;
this.binder = binder;
}
Resource getLocation() {
return this.location;
}
String getBound() {
return this.binder.get().bind("myprop", String.class).orElse(null);
}
String getProfileBound() {
return this.binder.get().bind("myprofileprop", String.class).orElse(null);
}
@Override
public void onApplicationEvent(BootstrapContextClosedEvent event) {
event.getApplicationContext().getBeanFactory().registerSingleton("loaderHelper", this);
}
}
}