AbstractKaaUserVerifier.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed 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.kaaproject.kaa.server.common.verifier;

import org.apache.avro.specific.SpecificRecordBase;
import org.kaaproject.kaa.common.avro.AvroByteArrayConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.text.MessageFormat;

public abstract class AbstractKaaUserVerifier<T extends SpecificRecordBase>
        implements UserVerifier {
  private static final Logger LOG = LoggerFactory.getLogger(AbstractKaaUserVerifier.class);

  @Override
  public void init(UserVerifierContext context) throws UserVerifierLifecycleException {
    LOG.info("Initializing user verifier with {}", context);
    AvroByteArrayConverter<T> converter = new AvroByteArrayConverter<>(getConfigurationClass());
    try {
      T configuration = converter.fromByteArray(context.getVerifierDto().getRawConfiguration());
      LOG.info("Initializing user verifier {} with {}", getClassName(), configuration);
      init(context, configuration);
    } catch (IOException initializationUserVerifierException) {
      LOG.error(MessageFormat.format(
              "Failed to initialize user verifier {0}",
              getClassName()), initializationUserVerifierException
      );
      throw new UserVerifierLifecycleException(initializationUserVerifierException);
    }
  }

  public abstract void init(
          UserVerifierContext context,
          T configuration
  ) throws UserVerifierLifecycleException;

  /**
   * Gets the configuration class.
   *
   * @return the configuration class
   */
  public abstract Class<T> getConfigurationClass();

  private String getClassName() {
    return this.getClass().getName();
  }
}