MonitoringRequestCommand.java

package org.springframework.roo.process.manager.internal;

import org.apache.commons.lang3.Validate;
import org.springframework.roo.file.monitor.FileMonitorService;
import org.springframework.roo.file.monitor.MonitoringRequest;
import org.springframework.roo.process.manager.CommandCallback;

/**
 * Represents a {@link CommandCallback} to start or stop monitoring a particular
 * file path.
 * 
 * @author Ben Alex
 * @since 1.0
 */
public class MonitoringRequestCommand implements CommandCallback<Boolean> {

  private final boolean add;
  private final FileMonitorService fileMonitorService;
  private final MonitoringRequest monitoringRequest;

  public MonitoringRequestCommand(final FileMonitorService fileMonitorService,
      final MonitoringRequest monitoringRequest, final boolean add) {
    Validate.notNull(fileMonitorService, "File monitor service required");
    Validate.notNull(monitoringRequest, "Request required");
    this.fileMonitorService = fileMonitorService;
    this.monitoringRequest = monitoringRequest;
    this.add = add;
  }

  public Boolean callback() {
    boolean result;
    if (add) {
      result = fileMonitorService.add(monitoringRequest);
    } else {
      result = fileMonitorService.remove(monitoringRequest);
    }
    fileMonitorService.scanAll();
    return result;
  }
}