[jira] [Resolved] (UNOMI-130) Use index templates to create new indexes with default mappings instead of Java code

["Serge Huber (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/UNOMI-130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Serge Huber resolved UNOMI-130.
-------------------------------
    Resolution: Fixed

> Use index templates to create new indexes with default mappings instead of Java code
> ------------------------------------------------------------------------------------
>
>                 Key: UNOMI-130
>                 URL: https://issues.apache.org/jira/browse/UNOMI-130
>             Project: Apache Unomi
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.3.0-incubating
>            Reporter: Serge Huber
>            Assignee: Serge Huber
>             Fix For: 1.3.0-incubating
>
>
> We use some Java code to insert default mappings and settings into automatically created indexes. But with ES 5.0 it is now possible to use index templates. We should therefore replace our custom code to use index templates, making maintenance and configuration of the templates a lot easier.
> See : https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html
> Basically this would allow us to replace something like this (from ElasticSearchPersistenceServiceImpl.java) : 
> {code}
>     private void internalCreateIndex(String indexName, Map<String, String> mappings) {
>         CreateIndexRequestBuilder builder = client.admin().indices().prepareCreate(indexName)
>                 .setSettings("{\n" +
>                         "    \"index\" : {\n" +
>                         "        \"number_of_shards\" : " + numberOfShards + ",\n" +
>                         "        \"number_of_replicas\" : " + numberOfReplicas + "\n" +
>                         "    },\n" +
>                         "    \"analysis\": {\n" +
>                         "      \"analyzer\": {\n" +
>                         "        \"folding\": {\n" +
>                         "          \"type\":\"custom\",\n" +
>                         "          \"tokenizer\": \"keyword\",\n" +
>                         "          \"filter\":  [ \"lowercase\", \"asciifolding\" ]\n" +
>                         "        }\n" +
>                         "      }\n" +
>                         "    }\n" +
>                         "}\n");
>         for (Map.Entry<String, String> entry : mappings.entrySet()) {
>             builder.addMapping(entry.getKey(), entry.getValue());
>         }
>         builder.execute().actionGet();
>         existingIndexNames.add(indexName);
>     }
> {code}
> to simply use something like this : 
> {code}
> {
>   "template": "te*",
>   "settings": {
>     "number_of_shards": 1
>   },
>   "mappings": {
>     "type1": {
>       "_source": {
>         "enabled": false
>       },
>       "properties": {
>         "host_name": {
>           "type": "keyword"
>         },
>         "created_at": {
>           "type": "date",
>           "format": "EEE MMM dd HH:mm:ss Z YYYY"
>         }
>       }
>     }
>   }
> }
> {code}



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