Examples with IndexChangeWatcher org.elasticsearch.plugins.changes.beans.IndexChangeWatcher used on opensource projects

Example 1 with IndexChangeWatcher

use of org.elasticsearch.plugins.changes.beans.IndexChangeWatcher in project elasticsearch-changes-plugin by derryx.

the class ChangesAction method handleRequest.

@Override
protected void handleRequest(RestRequest request, RestChannel channel, Client client) throws Exception {
    logger.debug("Request");
    List<String> indices = Arrays.asList(splitIndices(request.param("index")));
    if (indices.isEmpty()) {
        indices = new ArrayList<String>(changes.keySet());
    }
    boolean wait = request.paramAsBoolean("wait", Boolean.FALSE);
    long timeout = request.paramAsLong("timeout", 15 * 60 * 1000);
    // Wait for trigger
    if (wait) {
        IndexChangeWatcher watcher = addWatcher(indices, timeout);
        boolean changeDetected = watcher.aquire();
        removeWatcher(indices);
        if (!changeDetected) {
            channel.sendResponse(new BytesRestResponse(RestStatus.NOT_FOUND, "No change detected during timeout interval"));
            return;
        }
        if (watcher.getChange() == null || watcher.getChange().getType() == null) {
            channel.sendResponse(new BytesRestResponse(RestStatus.NOT_FOUND, "No more shards available to trigger waiting watch"));
            return;
        }
    }
    XContentBuilder builder = createXContentBuilderForChanges(request, indices);
    channel.sendResponse(new BytesRestResponse(OK, builder));
}