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-rw-r--r--container-search/src/main/java/com/yahoo/prelude/Freshness.java83
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diff --git a/container-search/src/main/java/com/yahoo/prelude/Freshness.java b/container-search/src/main/java/com/yahoo/prelude/Freshness.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.prelude;
+
+import java.util.Calendar;
+
+import static com.yahoo.text.Lowercase.toLowerCase;
+
+/**
+ * The parameters for a freshness query (uses the datetime http parameter)
+ * Parses the string part of the "datetime=<string>", converts it to seconds
+ * since epoch and send that plus sets the flag in the QueryX packet that
+ * enables freshnessboost in fsearch.
+ * <p>
+ * This is a value object
+ *
+ * @author <a href="mailto:pauran@yahoo-inc.com">Per G. Auran</a>
+ */
+public class Freshness {
+
+ private long refSecondsSinceEpoch = 0; // reference time
+
+ private void parse(String dateTime) {
+
+ /** Convert dateTime string to seconds since epoch */
+ if (dateTime.startsWith("now")) {
+
+ /** Case 1: if string starts with now: special case read system time */
+ refSecondsSinceEpoch = getSystemTimeInSecondsSinceEpoch();
+
+ /** Case 2: now can be followed by -seconds for time offset */
+ if (dateTime.startsWith("now-")) {
+ // offset in seconds may be given
+ String offsetStr = dateTime.substring(4);
+ long timeOffset;
+ if ( offsetStr.length() > 0) {
+ timeOffset = Long.parseLong(offsetStr);
+ } else {
+ timeOffset = 1;
+ }
+ refSecondsSinceEpoch = refSecondsSinceEpoch - timeOffset;
+ }
+ } else { /** Case 3: Reftime explicitly given seconds since epoch */
+ refSecondsSinceEpoch = Long.parseLong(dateTime);
+ }
+ // Need to activate freshness in the QueryX packet if enabled: See QueryPacket.java
+ }
+
+ public Freshness(String dateTime) {
+ parse(toLowerCase(dateTime)); // Set reference time
+ }
+
+ /** Calculates the current time since epoch in seconds */
+ public long getSystemTimeInSecondsSinceEpoch() {
+ long msSinceEpochNow = Calendar.getInstance().getTimeInMillis();
+ return (msSinceEpochNow/1000);
+ }
+
+ /** Get the reference time as a long value (in seconds since epoch) */
+ public long getRefTime() {return refSecondsSinceEpoch;}
+
+ /** Set the reference time as a string value */
+ @Override
+ public String toString() {
+ StringBuilder ser = new StringBuilder();
+ /** convert long value to string */
+ String dateTime = Long.toString(refSecondsSinceEpoch);
+ ser.append(dateTime);
+ return ser.toString().trim();
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ if (this == other) return true;
+ if (! (other instanceof Freshness)) return false;
+ return ((Freshness)other).refSecondsSinceEpoch == this.refSecondsSinceEpoch;
+ }
+
+ @Override
+ public int hashCode() {
+ return (int)refSecondsSinceEpoch;
+ }
+
+}