Example usage for java.nio.file WatchKey watchable

Introduction

In this page you can find the example usage for java.nio.file WatchKey watchable.

Prototype

Watchable watchable();

Source Link

Document

Returns the object for which this watch key was created.

Usage

From source file:org.wso2.carbon.uuf.renderablecreator.hbs.internal.io.RenderableUpdater.java

private void run() {
    while (!isWatchServiceStopped) {
        WatchKey watchKey;
        try {/*  w  ww.  j  av a  2s . com*/
            watchKey = watcher.take();
        } catch (ClosedWatchServiceException e) {
            log.debug("File watch service is closed.");
            return;
        } catch (InterruptedException e) {
            log.debug("File watch service interrupted.");
            return;
        }

        for (WatchEvent<?> event : watchKey.pollEvents()) {
            if (event.kind() != StandardWatchEventKinds.ENTRY_MODIFY) {
                continue; // We only watch file modify events.
            }

            Path updatedDirectory = (Path) watchKey.watchable();
            @SuppressWarnings("unchecked")
            Path updatedFileName = ((WatchEvent<Path>) event).context();
            MutableHbsRenderable mutableRenderable = watchingRenderables.get(updatedFileName);
            if (mutableRenderable != null) {
                // Updated file is a MutableHbsRenderable
                Path updatedFileAbsolutePath = updatedDirectory.resolve(updatedFileName);
                try {
                    String content = readFileContent(updatedFileAbsolutePath);
                    mutableRenderable.reload(new StringTemplateSource(mutableRenderable.getPath(), content));
                    log.info("Handlebars template '" + updatedFileAbsolutePath + "' reloaded successfully.");
                } catch (UUFException e) {
                    log.error("An error occurred while reloading Handlebars template '"
                            + updatedFileAbsolutePath + "'.", e);
                }
            } else {
                MutableExecutable mutableExecutable = watchingExecutables.get(updatedFileName);
                if (mutableExecutable != null) {
                    // Updated file is a MutableExecutable
                    Path updatedFileAbsolutePath = updatedDirectory.resolve(updatedFileName);
                    try {
                        mutableExecutable.reload(readFileContent(updatedFileAbsolutePath));
                        log.info("JavaScript file '" + updatedFileAbsolutePath + "' reloaded successfully.");
                    } catch (UUFException e) {
                        log.error("An error occurred while reloading JavaScript file '"
                                + updatedFileAbsolutePath + "'.", e);
                    }
                }
            }
        }

        boolean valid = watchKey.reset();
        if (!valid) {
            // Watch key cannot not be reset because watch service is already closed.
            break;
        }
    }
}

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From source file:org.wso2.carbon.uuf.renderablecreator.html.internal.io.HtmlRenderableUpdater.java

private void run() {
    while (!isWatchServiceStopped) {
        WatchKey watchKey;
        try {//from w w  w .java2s  .c o  m
            watchKey = watchService.take();
        } catch (ClosedWatchServiceException e) {
            log.debug("File watch service is closed.");
            return;
        } catch (InterruptedException e) {
            log.debug("File watch service interrupted.");
            return;
        }

        for (WatchEvent<?> watchEvent : watchKey.pollEvents()) {
            if (watchEvent.kind() != StandardWatchEventKinds.ENTRY_MODIFY) {
                continue;
            }

            Path updatedDirectory = (Path) watchKey.watchable();
            @SuppressWarnings("unchecked")
            Path updatedFileName = ((WatchEvent<Path>) watchEvent).context();
            // Updating the changed html file
            Path updatedFileAbsolutePath = updatedDirectory.resolve(updatedFileName);
            try (DirectoryStream<Path> stream = Files.newDirectoryStream(updatedFileAbsolutePath.getParent())) {
                for (Path entry : stream) {
                    if (Files.isDirectory(entry)) {
                        continue;
                    }

                    MutableHtmlRenderable mutableHtmlRenderable = watchingRenderables.get(entry);
                    if (mutableHtmlRenderable != null) {
                        try {
                            String content = new String(Files.readAllBytes(entry), StandardCharsets.UTF_8);
                            mutableHtmlRenderable.setHtml(content);
                            log.info("HTML template '" + entry + "' reloaded successfully.");
                        } catch (IOException e) {
                            log.error("An error occurred while reloading HTML template '" + entry + "'.", e);
                        }
                    }
                }
            } catch (IOException e) {
                log.error("An error occurred while reloading HTML template '" + updatedFileAbsolutePath + "'.",
                        e);
            }
        }

        boolean valid = watchKey.reset();
        if (!valid) {
            // Watch key cannot not be reset because watch service is already closed.
            break;
        }
    }
}

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