/*
* Copyright (c) 2014 Red Hat, Inc. and others
*
* Red Hat licenses this file to you 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 io.vertx.config.yaml;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;
import io.vertx.config.spi.ConfigProcessor;
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.core.json.JsonObject;
A processor using Jackson and SnakeYaml to read Yaml files.
Author: Clement Escoffier
/**
* A processor using Jackson and SnakeYaml to read Yaml files.
*
* @author <a href="http://escoffier.me">Clement Escoffier</a>
*/
public class YamlProcessor implements ConfigProcessor {
public static ObjectMapper YAML_MAPPER = new YAMLMapper();
@Override
public String name() {
return "yaml";
}
@Override
public void process(Vertx vertx, JsonObject configuration, Buffer input, Handler<AsyncResult<JsonObject>> handler) {
if (input.length() == 0) {
// the parser does not support empty files, which should be managed to be homogeneous
handler.handle(Future.succeededFuture(new JsonObject()));
return;
}
// Use executeBlocking even if the bytes are in memory
vertx.executeBlocking(
future -> {
try {
JsonNode root = YAML_MAPPER.readTree(input.toString("utf-8"));
JsonObject json = new JsonObject(root.toString());
future.complete(json);
} catch (Exception e) {
future.fail(e);
}
},
handler
);
}
}