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// Copyright 2015-2024 Nstream, inc.
//
// Licensed under the Redis Source Available License 2.0 (RSALv2) Agreement;
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://redis.com/legal/rsalv2-agreement/
//
// 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 nstream.adapter.jms;

import java.util.Properties;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import nstream.adapter.common.provision.AbstractProvision;
import nstream.adapter.common.provision.ProvisionLoader;
import swim.util.Log;

/**
 * Provision providing a single JMS {@link Connection} object.
 * Required properties:
 * 
 *   connectionFactoryProvisionName - name of the {@link ConnectionFactoryProvision}
 *   to create a connection from.
 * 
 */
public class ConnectionProvision extends AbstractProvision {

  public ConnectionProvision() {
  }

  @Override
  public void loadValue(Log log, Properties properties) {
    // Ensure available ConnectionFactory
    final String connectionFactoryProvisionName = properties.getProperty("connectionFactoryProvisionName");
    if (connectionFactoryProvisionName == null || connectionFactoryProvisionName.isEmpty()) {
      log.error("Did not load ConnectionProvision due to empty connectionFactoryProvisionName property");
      throw new IllegalArgumentException("ConnectionProvision config must include nonempty connectionFactoryProvisionName");
    }
    final ConnectionFactory connectionFactory;
    try {
      connectionFactory = ProvisionLoader.getProvision(connectionFactoryProvisionName).value();
    } catch (RuntimeException e) {
      log.error("Did not load ConnectionProvision due to nonempty but invalid connectionFactoryProvisionName property");
      throw new RuntimeException("No appropriate ConnectionFactory provision found under " + connectionFactoryProvisionName, e);
    }
    // Load connection
    try {
      this.value = connectionFactory.createConnection();
    } catch (Exception e) {
      log.error("Did not load ConnectionProvision due to issue loading Connection from properties");
      throw new RuntimeException("Failed to load Connection", e);
    }
  }

  @Override
  protected void unloadValue(Log log) {
    try {
      this.value.close();
    } catch (Exception e) {
      log.error("Failed to close Connection (" + e.getMessage() + ")");
      throw new RuntimeException("Failed to close Connection", e);
    }
  }

}