Example usage for io.vertx.core.file FileSystem existsBlocking

Introduction

In this page you can find the example usage for io.vertx.core.file FileSystem existsBlocking.

Prototype

boolean existsBlocking(String path);

Source Link

Document

Blocking version of #exists(String,Handler)

Usage

From source file:org.eclipse.hono.service.credentials.impl.FileBasedCredentialsService.java

License:Open Source License

protected void saveToFile(final Future<Void> writeResult) {

    if (!dirty) {
        log.trace("credentials registry does not need to be persisted");
        return;//from w  w w. ja va2  s . co m
    }

    final FileSystem fs = vertx.fileSystem();
    if (!fs.existsBlocking(filename)) {
        fs.createFileBlocking(filename);
    }
    final AtomicInteger idCount = new AtomicInteger();
    JsonArray tenants = new JsonArray();
    for (Entry<String, Map<String, JsonArray>> entry : credentials.entrySet()) {
        JsonArray credentialsArray = new JsonArray();
        for (Entry<String, JsonArray> credentialEntry : entry.getValue().entrySet()) { // authId -> full json attributes object
            JsonArray singleAuthIdCredentials = credentialEntry.getValue(); // from one authId

            credentialsArray.add(singleAuthIdCredentials);
            idCount.incrementAndGet();
        }
        tenants.add(
                new JsonObject().put(FIELD_TENANT, entry.getKey()).put(ARRAY_CREDENTIALS, credentialsArray));
    }
    fs.writeFile(filename, Buffer.factory.buffer(tenants.encodePrettily()), writeAttempt -> {
        if (writeAttempt.succeeded()) {
            dirty = false;
            log.trace("successfully wrote {} credentials to file {}", idCount.get(), filename);
            writeResult.complete();
        } else {
            log.warn("could not write credentials to file {}", filename, writeAttempt.cause());
            writeResult.fail(writeAttempt.cause());
        }
    });
}

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From source file:org.eclipse.hono.service.registration.impl.FileBasedRegistrationService.java

License:Open Source License

private void loadRegistrationData() {
    if (filename != null) {
        final FileSystem fs = vertx.fileSystem();
        log.debug("trying to load device registration information from file {}", filename);
        if (fs.existsBlocking(filename)) {
            final AtomicInteger deviceCount = new AtomicInteger();
            fs.readFile(filename, readAttempt -> {
                if (readAttempt.succeeded()) {
                    JsonArray allObjects = new JsonArray(new String(readAttempt.result().getBytes()));
                    for (Object obj : allObjects) {
                        JsonObject tenant = (JsonObject) obj;
                        String tenantId = tenant.getString(FIELD_TENANT);
                        Map<String, JsonObject> deviceMap = new HashMap<>();
                        for (Object deviceObj : tenant.getJsonArray(ARRAY_DEVICES)) {
                            JsonObject device = (JsonObject) deviceObj;
                            deviceMap.put(device.getString(FIELD_HONO_ID), device.getJsonObject(FIELD_DATA));
                            deviceCount.incrementAndGet();
                        }/* w  w w  .  j  a v a 2s  .co m*/
                        identities.put(tenantId, deviceMap);
                    }
                    log.info("successfully loaded {} device identities from file [{}]", deviceCount.get(),
                            filename);
                } else {
                    log.warn("could not load device identities from file [{}]", filename, readAttempt.cause());
                }
            });
        } else {
            log.debug("device identity file {} does not exist (yet)", filename);
        }
    }
}

---

From source file:org.eclipse.hono.service.registration.impl.FileBasedRegistrationService.java

License:Open Source License

private void saveToFile(final Future<Void> writeResult) {

    if (!dirty) {
        log.trace("registry does not need to be persisted");
        return;//from  w  w  w.j a v  a  2  s  .c om
    }

    final FileSystem fs = vertx.fileSystem();
    if (!fs.existsBlocking(filename)) {
        fs.createFileBlocking(filename);
    }
    final AtomicInteger idCount = new AtomicInteger();
    JsonArray tenants = new JsonArray();
    for (Entry<String, Map<String, JsonObject>> entry : identities.entrySet()) {
        JsonArray devices = new JsonArray();
        for (Entry<String, JsonObject> deviceEntry : entry.getValue().entrySet()) {
            devices.add(new JsonObject().put(FIELD_HONO_ID, deviceEntry.getKey()).put(FIELD_DATA,
                    deviceEntry.getValue()));
            idCount.incrementAndGet();
        }
        tenants.add(new JsonObject().put(FIELD_TENANT, entry.getKey()).put(ARRAY_DEVICES, devices));
    }
    fs.writeFile(filename, Buffer.factory.buffer(tenants.encodePrettily()), writeAttempt -> {
        if (writeAttempt.succeeded()) {
            dirty = false;
            log.trace("successfully wrote {} device identities to file {}", idCount.get(), filename);
            writeResult.complete();
        } else {
            log.warn("could not write device identities to file {}", filename, writeAttempt.cause());
            writeResult.fail(writeAttempt.cause());
        }
    });
}

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