source: timeline/src/main/java/geniusweb/progress/Progress.java@ 24

package geniusweb.progress;

import java.util.Date;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeInfo.As;

import geniusweb.deadline.Deadline;

/**
 * Progress is similar to {@link Deadline} but contains absolute values. It
 * always contains a hard termination moment at which the party should be
 * killed. This is used to free up the run server. The protocol should always
 * check its own clock, as parties may be ignoring or cheating with the
 * deadline.
 * <p>
 * immutable.
 */
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = As.WRAPPER_OBJECT)
@JsonSubTypes({ @JsonSubTypes.Type(value = ProgressTime.class),
                @JsonSubTypes.Type(value = ProgressRounds.class) })
@JsonAutoDetect(fieldVisibility = Visibility.ANY, getterVisibility = Visibility.NONE, setterVisibility = Visibility.NONE, isGetterVisibility = Visibility.NONE)
public interface Progress {
        /**
         * @param currentTimeMs the current time in ms since 1970 as from
         *                      {@link System#currentTimeMillis()}.
         * @return the current time as a fraction of the total amount of time/rounds
         *         available. So at start this returns 0, and when (and after) the
         *         deadline is reached this returns 1. Notice that when the progress
         *         is about the number of rounds, the party may also want to keep an
         *         eye on {@link #getTerminationTime()}.
         */
        Double get(Long currentTimeMs);

        /**
         * 
         * @return the unix time (UTC, ms since 1970) at which the party will be
         *         terminated. At this time the server can remove the party and free
         *         up its resources. Notice that server and party implementations
         *         are free to ignore this, the protocol should always check on
         *         whether a party is out of time.
         */
        Date getTerminationTime();

        /**
         * @param currentTimeMs the current time in ms since 1970 as from
         *                      {@link System#currentTimeMillis()}.
         * @return true iff the progress has passed the deadline.
         */
        boolean isPastDeadline(Long currentTimeMs);
}