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The UA Connect Java client library

There is a newer version: 5.4.2

/*
Copyright 2015 Urban Airship and Contributors
*/

package com.urbanairship.connect.client.offsets;

import com.google.common.base.Optional;

/**
 * Interface to manage stream offsets.
 */
public interface OffsetManager {

    /**
     * Gets the last stored offset.
     *
     * @return {@code Optional}
     */
    Optional getLastOffset();

    /**
     * Update the stored offset value.
     *
     * @param offset Long
     */
    void update(String offset);
}