nifi-registry-core/nifi-registry-framework/src/main/java/org/apache/nifi/registry/provider/hook/LoggingEventHookProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.nifi.registry.provider.hook;

import org.apache.nifi.registry.hook.Event;
import org.apache.nifi.registry.hook.EventField;
import org.apache.nifi.registry.hook.EventHookException;
import org.apache.nifi.registry.hook.EventHookProvider;
import org.apache.nifi.registry.provider.ProviderConfigurationContext;
import org.apache.nifi.registry.provider.ProviderCreationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LoggingEventHookProvider
    implements EventHookProvider {

    static final Logger LOGGER = LoggerFactory.getLogger(LoggingEventHookProvider.class);

    @Override
    public void onConfigured(ProviderConfigurationContext configurationContext) throws ProviderCreationException {
        // Nothing to do
    }

    @Override
    public void handle(final Event event) throws EventHookException {

        final StringBuilder builder = new StringBuilder()
                .append(event.getEventType())
                .append(" [");

        int count = 0;
        for (final EventField argument : event.getFields()) {
            if (count > 0) {
                builder.append(", ");
            }
            builder.append(argument.getName()).append("=").append(argument.getValue());
            count++;
        }

        builder.append("] ");

        LOGGER.info(builder.toString());
    }

}