Example usage for io.vertx.core.file AsyncFile write

Introduction

In this page you can find the example usage for io.vertx.core.file AsyncFile write.

Prototype

Future<Void> write(T data);

Source Link

Document

Write some data to the stream.

Usage

From source file:com.deblox.releaseboard.ReleaseBoardVerticle.java

License:Apache License

public void saveState() {
    logger.info("saving state");
    JsonObject db = new JsonObject();
    JsonArray releases = new JsonArray();

    Iterator<Map.Entry<String, JsonObject>> iter = releasesData.entrySet().iterator();
    while (iter.hasNext()) {
        Map.Entry<String, JsonObject> entry = iter.next();
        JsonObject rel = new JsonObject();
        rel.put("id", entry.getKey());
        rel.put("data", entry.getValue());
        releases.add(rel);// w  ww.j a  v a  2  s. co  m
    }

    db.put("releases", releases);

    vertx.fileSystem().exists(stateFile, te -> {
        if (te.succeeded()) {
            if (te.result().booleanValue()) {
                vertx.fileSystem().deleteBlocking(stateFile);
                vertx.fileSystem().createFileBlocking(stateFile);
            } else {
                vertx.fileSystem().createFileBlocking(stateFile);
            }

        } else {
            logger.warn("unable to check if file exists: " + stateFile);
        }

        vertx.fileSystem().open(stateFile, new OpenOptions().setCreate(true).setWrite(true), r -> {
            if (r.succeeded()) {
                AsyncFile file = r.result();
                file.write(Buffer.buffer(db.toString()));
                file.close();
            } else {
                logger.warn(r.cause());
            }
        });

    });

}

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