How to upsert custom Search Attributes

In your Workflow code, call the upsertSearchAttributes(Map<String, ?> searchAttributes) method.

 Map<String, Object> attr1 = new HashMap<>();
     attr1.put("CustomIntField", 1);
     attr1.put("CustomBoolField", true);
     Workflow.upsertSearchAttributes(attr1);

     Map<String, Object> attr2 = new HashMap<>();
     attr2.put("CustomIntField", Lists.newArrayList(1, 2));
     attr2.put("CustomKeywordField", "Seattle");
     Workflow.upsertSearchAttributes(attr2);

The results of upsertSearchAttributes() output the following search attributes.

   {
       "CustomIntField": 1, 2,
       "CustomBoolField": true,
       "CustomKeywordField": "Seattle",
     }