/*
* Copyright 2013 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 ratpack.groovy.internal;
import groovy.lang.Closure;
import groovy.lang.Script;
import io.netty.buffer.ByteBuf;
import ratpack.func.Action;
import ratpack.func.Factory;
import ratpack.func.Function;
import ratpack.groovy.script.internal.ScriptEngine;
import ratpack.handling.Context;
import ratpack.handling.Handler;
import ratpack.reload.internal.ReloadableFileBackedFactory;
import ratpack.util.internal.IoUtils;
import java.nio.file.Path;
import static ratpack.util.ExceptionUtils.uncheck;
public class ScriptBackedApp implements Handler {
private final Factory<Handler> reloadHandler;
private final Path script;
public ScriptBackedApp(Path script, final boolean staticCompile, boolean reloadable, final Function<Closure<?>, Handler> closureTransformer) {
this.script = script;
this.reloadHandler = new ReloadableFileBackedFactory<>(script, reloadable, new ReloadableFileBackedFactory.Producer<Handler>() {
public Handler produce(final Path file, final ByteBuf bytes) {
try {
final String string = IoUtils.utf8String(bytes);
final ScriptEngine<Script> scriptEngine = new ScriptEngine<>(getClass().getClassLoader(), staticCompile, Script.class);
Runnable runScript = new Runnable() {
public void run() {
try {
scriptEngine.create(file.getFileName().toString(), file, string).run();
} catch (Exception e) {
throw uncheck(e);
}
}
};
ClosureCaptureAction backing = new ClosureCaptureAction();
RatpackScriptBacking.withBacking(backing, runScript);
return closureTransformer.apply(backing.closure);
} catch (Exception e) {
throw uncheck(e);
}
}
});
new Thread(new Runnable() {
public void run() {
try {
reloadHandler.create();
} catch (Exception ignore) {
// ignore
}
}
}).run();
}
public void handle(Context context) throws Exception {
Handler handler = reloadHandler.create();
if (handler == null) {
context.getResponse().send("script file does not exist:" + script.toAbsolutePath());
} else {
handler.handle(context);
}
}
private static class ClosureCaptureAction implements Action<Closure<?>> {
private Closure<?> closure;
public void execute(Closure<?> configurer) throws Exception {
closure = configurer;
}
}
}