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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.application;
import com.google.common.collect.ImmutableMap;
import com.google.inject.AbstractModule;
import com.google.inject.Key;
import com.google.inject.Module;
import com.yahoo.jdisc.Container;
import com.yahoo.jdisc.handler.RequestHandler;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* <p>This is the inactive, mutable {@link Container}. Because it requires references to the application internals, it
* should always be injected by guice or created by calling {@link ContainerActivator#newContainerBuilder()}. Once the
* builder has been configured, it is activated by calling {@link
* ContainerActivator#activateContainer(ContainerBuilder)}. You may use the {@link #setAppContext(Object)} method to
* attach an arbitrary object to a Container, which will be available in the corresponding {@link
* DeactivatedContainer}.</p>
*
* @author Simon Thoresen Hult
*/
public class ContainerBuilder {
private final GuiceRepository guiceModules = new GuiceRepository();
private final ServerRepository serverProviders = new ServerRepository(guiceModules);
private final Map<String, BindingRepository<RequestHandler>> serverBindings = new HashMap<>();
private final Map<String, BindingRepository<RequestHandler>> clientBindings = new HashMap<>();
private Object appContext = null;
public ContainerBuilder(Iterable<Module> guiceModules) {
this.guiceModules.installAll(guiceModules);
this.guiceModules.install(new AbstractModule() {
@Override
public void configure() {
bind(ContainerBuilder.class).toInstance(ContainerBuilder.this);
}
});
this.serverBindings.put(BindingSet.DEFAULT, new BindingRepository<>());
this.clientBindings.put(BindingSet.DEFAULT, new BindingRepository<>());
}
public void setAppContext(Object ctx) {
appContext = ctx;
}
public Object appContext() {
return appContext;
}
public GuiceRepository guiceModules() {
return guiceModules;
}
public <T> T getInstance(Key<T> key) {
return guiceModules.getInstance(key);
}
public <T> T getInstance(Class<T> type) {
return guiceModules.getInstance(type);
}
public ServerRepository serverProviders() {
return serverProviders;
}
public BindingRepository<RequestHandler> serverBindings() {
return serverBindings.get(BindingSet.DEFAULT);
}
public BindingRepository<RequestHandler> serverBindings(String setName) {
BindingRepository<RequestHandler> ret = serverBindings.get(setName);
if (ret == null) {
ret = new BindingRepository<>();
serverBindings.put(setName, ret);
}
return ret;
}
public Map<String, BindingSet<RequestHandler>> activateServerBindings() {
Map<String, BindingSet<RequestHandler>> ret = new HashMap<>();
for (Map.Entry<String, BindingRepository<RequestHandler>> entry : serverBindings.entrySet()) {
ret.put(entry.getKey(), entry.getValue().activate());
}
return ImmutableMap.copyOf(ret);
}
public BindingRepository<RequestHandler> clientBindings() {
return clientBindings.get(BindingSet.DEFAULT);
}
public BindingRepository<RequestHandler> clientBindings(String setName) {
BindingRepository<RequestHandler> ret = clientBindings.get(setName);
if (ret == null) {
ret = new BindingRepository<>();
clientBindings.put(setName, ret);
}
return ret;
}
public Map<String, BindingSet<RequestHandler>> activateClientBindings() {
Map<String, BindingSet<RequestHandler>> ret = new HashMap<>();
for (Map.Entry<String, BindingRepository<RequestHandler>> entry : clientBindings.entrySet()) {
ret.put(entry.getKey(), entry.getValue().activate());
}
return ImmutableMap.copyOf(ret);
}
@SuppressWarnings({ "unchecked" })
public static <T> Class<T> safeClassCast(Class<T> baseClass, Class<?> someClass) {
if (!baseClass.isAssignableFrom(someClass)) {
throw new IllegalArgumentException("Expected " + baseClass.getName() + ", got " +
someClass.getName() + ".");
}
return (Class<T>)someClass;
}
public static List<String> safeStringSplit(Object obj, String delim) {
if (!(obj instanceof String)) {
return Collections.emptyList();
}
List<String> lst = new LinkedList<>();
for (String str : ((String)obj).split(delim)) {
str = str.trim();
if (!str.isEmpty()) {
lst.add(str);
}
}
return lst;
}
}
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