io.vertx.ext.web.templ.httl.impl.HTTLTemplateEngineImpl Maven / Gradle / Ivy
/*
* Copyright 2016 Red Hat, Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* You may elect to redistribute this code under either of these licenses.
*/
package io.vertx.ext.web.templ.httl.impl;
import httl.Engine;
import httl.Template;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.Vertx;
import io.vertx.core.buffer.Buffer;
import io.vertx.ext.web.common.template.CachingTemplateEngine;
import io.vertx.ext.web.common.template.impl.TemplateHolder;
import io.vertx.ext.web.templ.httl.HTTLTemplateEngine;
import java.io.Writer;
import java.util.Map;
/**
* @author Victor Quezado
*/
public class HTTLTemplateEngineImpl extends CachingTemplateEngine implements HTTLTemplateEngine {
private final Engine engine;
public HTTLTemplateEngineImpl(Vertx vertx, String extension) {
super(vertx, extension);
engine = Engine.getEngine();
}
@Override
public T unwrap() {
return (T) engine;
}
@Override
public void render(Map context, String templateFile, Handler> handler) {
try {
String src = adjustLocation(templateFile);
TemplateHolder template = getTemplate(src);
if (template == null) {
// real compile
synchronized (this) {
// Compile
template = new TemplateHolder<>(engine.getTemplate(src));
}
putTemplate(src, template);
}
final Buffer buffer = Buffer.buffer();
template.template().render(context, new Writer() {
@Override
public void write(char[] cbuf, int off, int len) {
buffer.appendString(new String(cbuf, off, len));
}
@Override
public void flush() {
}
@Override
public void close() {
}
});
handler.handle(Future.succeededFuture(buffer));
} catch (Exception ex) {
handler.handle(Future.failedFuture(ex));
}
}
}
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