project routing can be present in the body of the request

Author: piergm

server/src/main/java/org/elasticsearch/action/search/OpenPointInTimeRequest.java

@@ -212,7 +212,10 @@ public String getProjectRouting() {
         return projectRouting;
     }
 
-    public void projectRouting(String projectRouting) {
+    public void projectRouting(@Nullable String projectRouting) {
+        if (this.projectRouting != null) {
+            throw new IllegalArgumentException("project_routing is already set to [" + this.projectRouting + "]");
+        }
         this.projectRouting = projectRouting;
     }
 

server/src/main/java/org/elasticsearch/action/search/RestOpenPointInTimeAction.java

@@ -83,8 +83,10 @@ public RestChannelConsumer prepareRequest(final RestRequest request, final NodeC
 
     private static final ObjectParser<OpenPointInTimeRequest, Void> PARSER = new ObjectParser<>("open_point_in_time_request");
     private static final ParseField INDEX_FILTER_FIELD = new ParseField("index_filter");
+    private static final ParseField PROJECT_ROUTING = new ParseField("project_routing");
 
     static {
         PARSER.declareObject(OpenPointInTimeRequest::indexFilter, (p, c) -> parseTopLevelQuery(p), INDEX_FILTER_FIELD);
+        PARSER.declareString(OpenPointInTimeRequest::projectRouting, PROJECT_ROUTING);
     }
 }