Examples with HandlerResources com.nextdoor.bender.config.HandlerResources used on opensource projects

Example 1 with HandlerResources

use of com.nextdoor.bender.config.HandlerResources in project bender by Nextdoor.

the class BaseHandler method init.

/**
 * Loads @{link com.nextdoor.bender.config.Configuration} from a resource file and initializes
 * classes.
 *
 * @param ctx function context as specified when function is invoked by lambda.
 * @throws HandlerException error while loading the @{link
 *         com.nextdoor.bender.config.Configuration}.
 */
public void init(Context ctx) throws HandlerException {
    /*
     * Function alias is the last part of the Function ARN
     */
    String alias = null;
    String[] tokens = ctx.getInvokedFunctionArn().split(":");
    if (tokens.length == 7) {
        alias = "$LATEST";
    } else if (tokens.length == 8) {
        alias = tokens[7];
    }
    BenderLayout.ALIAS = alias;
    BenderLayout.VERSION = ctx.getFunctionVersion();
    /*
     * Create a new monitor and then get a static copy of it
     */
    monitor = Monitor.getInstance();
    monitor.addTag("functionName", ctx.getFunctionName());
    monitor.addTag("functionVersion", alias);
    String configFile;
    /*
     * TODO: Replace this to always use env vars. Code was written prior to
     * lambda env vars existing.
     */
    if (System.getenv("BENDER_CONFIG") != null) {
        configFile = System.getenv("BENDER_CONFIG");
    } else if (CONFIG_FILE == null) {
        configFile = "/config/" + alias;
    } else {
        configFile = CONFIG_FILE;
    }
    logger.info(String.format("Bender Initializing (config: %s)", configFile));
    try {
        if (configFile.startsWith("s3://")) {
            config = BenderConfig.load(s3ClientFactory, new AmazonS3URI(configFile));
        } else {
            config = BenderConfig.load(configFile);
        }
    } catch (ConfigurationException e) {
        throw new HandlerException("Error loading configuration: " + e.getMessage(), e);
    }
    HandlerResources handlerResources;
    try {
        handlerResources = new HandlerResources(config);
    } catch (ClassNotFoundException e) {
        throw new HandlerException("Unable to load resource: " + e.getMessage(), e);
    }
    /*
     * Register reporters
     */
    monitor.addReporters(handlerResources.getReporters());
    /*
     * Init other things
     */
    wrapper = handlerResources.getWrapperFactory().newInstance();
    ser = handlerResources.getSerializerProcessor();
    setIpcService(new IpcSenderService(handlerResources.getTransportFactory()));
    sources = new ArrayList<Source>(handlerResources.getSources().values());
    initialized = true;
}