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public interface ExternalResourceDriver {
	/**
	 * Configures this driver. This method should always be called first on a newly instantiated driver.
	 *
	 * @param config configuration contains all parameters set for this driver
	 */
	void open(Configuration config) throws Exception;

	/**
	 * Closes this driver. Should be used to clean state and release resources.
	 */
	void close() throws Exception;

    /**
    * Retrieve the information of the external resources according to the resourceProfile.
    */
    List<ExternalResourceInfo>Set<ExternalResourceInfo> retrieveResourceInfo(ResourceProfile resourceProfile);
}

public interface ExternalResourceDriver {
	/**
	 * Configures this driver. This method should always be called first on a newly instantiated driver.
	 *
	 * @param config configuration contains all parameters set for this driver
	 */
	void open(Configuration config) throws Exception;

	/**
	 * Closes this driver. Should be used to clean state and release resources.
	 */
	void close() throws Exception;

    /**
    * Retrieve the information of the external resources according to the resourceProfile.
    */
    List<ExternalResourceInfo>Set<ExternalResourceInfo> retrieveResourceInfo(ResourceProfile resourceProfile);
}

public interface ExternalResourceInfo {
	String getInformation();
}