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/*
* Copyright (c) 2011-2019 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package com.arangodb.shaded.vertx.core.impl;
import com.arangodb.shaded.vertx.core.DeploymentOptions;
import com.arangodb.shaded.vertx.core.Future;
import com.arangodb.shaded.vertx.core.Promise;
import com.arangodb.shaded.vertx.core.ServiceHelper;
import com.arangodb.shaded.vertx.core.Verticle;
import com.arangodb.shaded.vertx.core.spi.VerticleFactory;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author Tim Fox
*/
public class VerticleManager {
private final VertxInternal vertx;
private final DeploymentManager deploymentManager;
private final LoaderManager loaderManager = new LoaderManager();
private final Map> verticleFactories = new ConcurrentHashMap<>();
private final List defaultFactories = new ArrayList<>();
public VerticleManager(VertxInternal vertx, DeploymentManager deploymentManager) {
this.vertx = vertx;
this.deploymentManager = deploymentManager;
loadVerticleFactories();
}
private void loadVerticleFactories() {
Collection factories = ServiceHelper.loadFactories(VerticleFactory.class);
factories.forEach(this::registerVerticleFactory);
VerticleFactory defaultFactory = new JavaVerticleFactory();
defaultFactory.init(vertx);
defaultFactories.add(defaultFactory);
}
public void registerVerticleFactory(VerticleFactory factory) {
String prefix = factory.prefix();
if (prefix == null) {
throw new IllegalArgumentException("factory.prefix() cannot be null");
}
List facts = verticleFactories.get(prefix);
if (facts == null) {
facts = new ArrayList<>();
verticleFactories.put(prefix, facts);
}
if (facts.contains(factory)) {
throw new IllegalArgumentException("Factory already registered");
}
facts.add(factory);
// Sort list in ascending order
facts.sort((fact1, fact2) -> fact1.order() - fact2.order());
factory.init(vertx);
}
public void unregisterVerticleFactory(VerticleFactory factory) {
String prefix = factory.prefix();
if (prefix == null) {
throw new IllegalArgumentException("factory.prefix() cannot be null");
}
List facts = verticleFactories.get(prefix);
boolean removed = false;
if (facts != null) {
if (facts.remove(factory)) {
removed = true;
}
if (facts.isEmpty()) {
verticleFactories.remove(prefix);
}
}
if (!removed) {
throw new IllegalArgumentException("factory isn't registered");
}
}
public Set verticleFactories() {
Set facts = new HashSet<>();
for (List list: verticleFactories.values()) {
facts.addAll(list);
}
return facts;
}
private List resolveFactories(String identifier) {
/*
We resolve the verticle factory list to use as follows:
1. We look for a prefix in the identifier.
E.g. the identifier might be "js:app.js" <-- the prefix is "js"
If it exists we use that to lookup the verticle factory list
2. We look for a suffix (like a file extension),
E.g. the identifier might be just "app.js"
If it exists we use that to lookup the factory list
3. If there is no prefix or suffix OR there is no match then defaults will be used
*/
List factoryList = null;
int pos = identifier.indexOf(':');
String lookup = null;
if (pos != -1) {
// Infer factory from prefix, e.g. "java:" or "js:"
lookup = identifier.substring(0, pos);
} else {
// Try and infer name from extension
pos = identifier.lastIndexOf('.');
if (pos != -1) {
lookup = getSuffix(pos, identifier);
} else {
// No prefix, no extension - use defaults
factoryList = defaultFactories;
}
}
if (factoryList == null) {
factoryList = verticleFactories.get(lookup);
if (factoryList == null) {
factoryList = defaultFactories;
}
}
return factoryList;
}
private static String getSuffix(int pos, String str) {
if (pos + 1 >= str.length()) {
throw new IllegalArgumentException("Invalid name: " + str);
}
return str.substring(pos + 1);
}
public Future deployVerticle(String identifier,
DeploymentOptions options) {
ContextInternal callingContext = vertx.getOrCreateContext();
ClassLoaderHolder holder;
ClassLoader loader = options.getClassLoader();
if (loader == null) {
holder = loaderManager.getClassLoader(options);
loader = holder != null ? holder.loader : getCurrentClassLoader();
} else {
holder = null;
}
Future deployment = doDeployVerticle(identifier, options, callingContext, callingContext, loader);
if (holder != null) {
deployment.onComplete(ar -> {
if (ar.succeeded()) {
Deployment result = ar.result();
result.undeployHandler(v -> {
loaderManager.release(holder);
});
} else {
// ??? not tested
throw new UnsupportedOperationException();
}
});
}
return deployment;
}
private Future doDeployVerticle(String identifier,
DeploymentOptions options,
ContextInternal parentContext,
ContextInternal callingContext,
ClassLoader cl) {
List verticleFactories = resolveFactories(identifier);
Iterator iter = verticleFactories.iterator();
return doDeployVerticle(iter, null, identifier, options, parentContext, callingContext, cl);
}
private Future doDeployVerticle(Iterator iter,
Throwable prevErr,
String identifier,
DeploymentOptions options,
ContextInternal parentContext,
ContextInternal callingContext,
ClassLoader cl) {
if (iter.hasNext()) {
VerticleFactory verticleFactory = iter.next();
return doDeployVerticle(verticleFactory, identifier, options, parentContext, callingContext, cl)
.recover(err -> {
// Try the next one
return doDeployVerticle(iter, err, identifier, options, parentContext, callingContext, cl);
});
} else {
if (prevErr != null) {
// Report failure if there are no more factories to try otherwise try the next one
return callingContext.failedFuture(prevErr);
} else {
// not handled or impossible ?
throw new UnsupportedOperationException();
}
}
}
private Future doDeployVerticle(VerticleFactory verticleFactory,
String identifier,
DeploymentOptions options,
ContextInternal parentContext,
ContextInternal callingContext,
ClassLoader cl) {
Promise> p = callingContext.promise();
try {
verticleFactory.createVerticle(identifier, cl, p);
} catch (Exception e) {
return Future.failedFuture(e);
}
return p.future()
.compose(callable -> deploymentManager.doDeploy(options, v -> identifier, parentContext, callingContext, cl, callable));
}
static ClassLoader getCurrentClassLoader() {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (cl == null) {
cl = VerticleManager.class.getClassLoader();
}
return cl;
}
}
