Examples with Configurable org.apache.kafka.common.Configurable used on opensource projects

Example 1 with Configurable

use of org.apache.kafka.common.Configurable in project kafka by apache.

the class AbstractConfig method getConfiguredInstance.

/**
     * Get a configured instance of the give class specified by the given configuration key. If the object implements
     * Configurable configure it using the configuration.
     *
     * @param key The configuration key for the class
     * @param t The interface the class should implement
     * @return A configured instance of the class
     */
public <T> T getConfiguredInstance(String key, Class<T> t) {
    Class<?> c = getClass(key);
    if (c == null)
        return null;
    Object o = Utils.newInstance(c);
    if (!t.isInstance(o))
        throw new KafkaException(c.getName() + " is not an instance of " + t.getName());
    if (o instanceof Configurable)
        ((Configurable) o).configure(originals());
    return t.cast(o);
}

Example 2 with Configurable

use of org.apache.kafka.common.Configurable in project kafka by apache.

the class AbstractConfig method getConfiguredInstances.

/**
     * Get a list of configured instances of the given class specified by the given configuration key. The configuration
     * may specify either null or an empty string to indicate no configured instances. In both cases, this method
     * returns an empty list to indicate no configured instances.
     * @param key The configuration key for the class
     * @param t The interface the class should implement
     * @param configOverrides Configuration overrides to use.
     * @return The list of configured instances
     */
public <T> List<T> getConfiguredInstances(String key, Class<T> t, Map<String, Object> configOverrides) {
    List<String> klasses = getList(key);
    List<T> objects = new ArrayList<T>();
    if (klasses == null)
        return objects;
    Map<String, Object> configPairs = originals();
    configPairs.putAll(configOverrides);
    for (Object klass : klasses) {
        Object o;
        if (klass instanceof String) {
            try {
                o = Utils.newInstance((String) klass, t);
            } catch (ClassNotFoundException e) {
                throw new KafkaException(klass + " ClassNotFoundException exception occurred", e);
            }
        } else if (klass instanceof Class<?>) {
            o = Utils.newInstance((Class<?>) klass);
        } else
            throw new KafkaException("List contains element of type " + klass.getClass().getName() + ", expected String or Class");
        if (!t.isInstance(o))
            throw new KafkaException(klass + " is not an instance of " + t.getName());
        if (o instanceof Configurable)
            ((Configurable) o).configure(configPairs);
        objects.add(t.cast(o));
    }
    return objects;
}