handle timestamp and TTL in update action

src/main/java/org/elasticsearch/action/update/TransportUpdateAction.java

@@ -43,6 +43,7 @@ import org.elasticsearch.cluster.routing.ShardRouting;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentHelper;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.engine.DocumentMissingException;
@@ -52,7 +53,7 @@ import org.elasticsearch.index.get.GetResult;
 import org.elasticsearch.index.mapper.internal.ParentFieldMapper;
 import org.elasticsearch.index.mapper.internal.RoutingFieldMapper;
 import org.elasticsearch.index.mapper.internal.SourceFieldMapper;
-import org.elasticsearch.index.mapper.internal.TimestampFieldMapper;
+import org.elasticsearch.index.mapper.internal.TTLFieldMapper;
 import org.elasticsearch.index.service.IndexService;
 import org.elasticsearch.index.shard.IllegalIndexShardStateException;
 import org.elasticsearch.index.shard.ShardId;
@@ -152,8 +153,9 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
         IndexService indexService = indicesService.indexServiceSafe(request.index());
         IndexShard indexShard = indexService.shardSafe(request.shardId());
 
+        long getDate = System.currentTimeMillis();
         GetResult getResult = indexShard.getService().get(request.type(), request.id(),
-                new String[]{SourceFieldMapper.NAME, RoutingFieldMapper.NAME, ParentFieldMapper.NAME, TimestampFieldMapper.NAME}, true);
+                new String[]{SourceFieldMapper.NAME, RoutingFieldMapper.NAME, ParentFieldMapper.NAME, TTLFieldMapper.NAME}, true);
 
         // no doc, what to do, what to do...
         if (!getResult.exists()) {
@@ -183,12 +185,28 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
         }
 
         String operation = (String) ctx.get("op");
+        String timestamp = (String) ctx.get("_timestamp");
+        Long ttl = null;
+        Object fetchedTTL = ctx.get("_ttl");
+        if (fetchedTTL != null) {
+            if (fetchedTTL instanceof Number) {
+                ttl = ((Number) fetchedTTL).longValue();
+            } else {
+                ttl = TimeValue.parseTimeValue((String) fetchedTTL, null).millis();
+            }
+        }
         source = (Map<String, Object>) ctx.get("_source");
 
         // apply script to update the source
         String routing = getResult.fields().containsKey(RoutingFieldMapper.NAME) ? getResult.field(RoutingFieldMapper.NAME).value().toString() : null;
         String parent = getResult.fields().containsKey(ParentFieldMapper.NAME) ? getResult.field(ParentFieldMapper.NAME).value().toString() : null;
-        // TODO ttl/timestamp
+        // No TTL has been given in the update script so we keep previous TTL value if there is one
+        if (ttl == null) {
+            ttl = getResult.fields().containsKey(TTLFieldMapper.NAME) ? (Long) getResult.field(TTLFieldMapper.NAME).value() : null;
+            if (ttl != null) {
+                ttl = ttl - (System.currentTimeMillis() - getDate); // It is an approximation of exact TTL value, could be improved
+            }
+        }
 
         // TODO percolate?
 
@@ -197,7 +215,8 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
         if (operation == null || "index".equals(operation)) {
             IndexRequest indexRequest = Requests.indexRequest(request.index()).type(request.type()).id(request.id()).routing(routing).parent(parent)
                     .source(source, sourceAndContent.v1())
-                    .version(getResult.version()).replicationType(request.replicationType()).consistencyLevel(request.consistencyLevel());
+                    .version(getResult.version()).replicationType(request.replicationType()).consistencyLevel(request.consistencyLevel())
+                    .timestamp(timestamp).ttl(ttl);
             indexRequest.operationThreaded(false);
             indexAction.execute(indexRequest, new ActionListener<IndexResponse>() {
                 @Override