[[breaking_50_java_api_changes]] === Java API changes ==== Count api has been removed The deprecated count api has been removed from the Java api, use the search api instead and set size to 0. The following call [source,java] ----- client.prepareCount(indices).setQuery(query).get(); ----- can be replaced with [source,java] ----- client.prepareSearch(indices).setSource(new SearchSourceBuilder().size(0).query(query)).get(); ----- ==== Suggest api has been removed The suggest api has been removed from the Java api, use the suggest option in search api, it has been optimized for suggest-only request. The following call [source,java] ----- client.prepareSuggest(indices).addSuggestion("foo", SuggestBuilders.completionSuggestion("field").text("s")).get(); ----- can be replaced with [source,java] ----- client.prepareSearch(indices).suggest(new SuggestBuilder().addSuggestion("foo", SuggestBuilders.completionSuggestion("field").text("s"))).get(); ----- ==== Elasticsearch will no longer detect logging implementations Elasticsearch now logs only to log4j 1.2. Previously if log4j wasn't on the classpath it made some effort to degrade to slf4j or java.util.logging. Now it will fail to work without the log4j 1.2 api. The log4j-over-slf4j bridge ought to work when using the java client, as should log4j 2's log4j-1.2-api. The Elasticsearch server now only supports log4j as configured by `logging.yml` and will fail if log4j isn't present. ==== Groovy dependencies In previous versions of Elasticsearch, the Groovy scripting capabilities depended on the `org.codehaus.groovy:groovy-all` artifact. In addition to pulling in the Groovy language, this pulls in a very large set of functionality, none of which is needed for scripting within Elasticsearch. Aside from the inherent difficulties in managing such a large set of dependencies, this also increases the surface area for security issues. This dependency has been reduced to the core Groovy language `org.codehaus.groovy:groovy` artifact. ==== DocumentAlreadyExistsException removed `DocumentAlreadyExistsException` is removed and a `VersionConflictException` is thrown instead (with a better error description). This will influence code that use the `IndexRequest.opType()` or `IndexRequest.create()` to index a document only if it doesn't already exist. ==== Changes to Query Builders ===== BoostingQueryBuilder Removed setters for mandatory positive/negative query. Both arguments now have to be supplied at construction time already and have to be non-null. ===== SpanContainingQueryBuilder Removed setters for mandatory big/little inner span queries. Both arguments now have to be supplied at construction time already and have to be non-null. Updated static factory methods in QueryBuilders accordingly. ===== SpanOrQueryBuilder Making sure that query contains at least one clause by making initial clause mandatory in constructor. Renaming method to add clauses from `clause(SpanQueryBuilder)` to `addClause(SpanQueryBuilder)`. ===== SpanNearQueryBuilder Removed setter for mandatory slop parameter, needs to be set in constructor now. Also making sure that query contains at least one clause by making initial clause mandatory in constructor. Updated the static factory methods in QueryBuilders accordingly. Renaming method to add clauses from `clause(SpanQueryBuilder)` to `addClause(SpanQueryBuilder)`. ===== SpanNotQueryBuilder Removed setter for mandatory include/exclude span query clause, needs to be set in constructor now. Updated the static factory methods in QueryBuilders and tests accordingly. ===== SpanWithinQueryBuilder Removed setters for mandatory big/little inner span queries. Both arguments now have to be supplied at construction time already and have to be non-null. Updated static factory methods in QueryBuilders accordingly. ===== WrapperQueryBuilder Removed `wrapperQueryBuilder(byte[] source, int offset, int length)`. Instead simply use `wrapperQueryBuilder(byte[] source)`. Updated the static factory methods in QueryBuilders accordingly. ===== QueryStringQueryBuilder Removed ability to pass in boost value using `field(String field)` method in form e.g. `field^2`. Use the `field(String, float)` method instead. ===== Operator Removed the enums called `Operator` from `MatchQueryBuilder`, `QueryStringQueryBuilder`, `SimpleQueryStringBuilder`, and `CommonTermsQueryBuilder` in favour of using the enum defined in `org.elasticsearch.index.query.Operator` in an effort to consolidate the codebase and avoid duplication. ===== queryName and boost support Support for `queryName` and `boost` has been streamlined to all of the queries. That is a breaking change till queries get sent over the network as serialized json rather than in `Streamable` format. In fact whenever additional fields are added to the json representation of the query, older nodes might throw error when they find unknown fields. ===== InnerHitsBuilder InnerHitsBuilder now has a dedicated addParentChildInnerHits and addNestedInnerHits methods to differentiate between inner hits for nested vs. parent / child documents. This change makes the type / path parameter mandatory. ===== MatchQueryBuilder Moving MatchQueryBuilder.Type and MatchQueryBuilder.ZeroTermsQuery enum to MatchQuery.Type. Also reusing new Operator enum. ===== MoreLikeThisQueryBuilder Removed `MoreLikeThisQueryBuilder.Item#id(String id)`, `Item#doc(BytesReference doc)`, `Item#doc(XContentBuilder doc)`. Use provided constructors instead. Removed `MoreLikeThisQueryBuilder#addLike` in favor of texts and/or items being provided at construction time. Using arrays there instead of lists now. Removed `MoreLikeThisQueryBuilder#addUnlike` in favor to using the `unlike` methods which take arrays as arguments now rather than the lists used before. The deprecated `docs(Item... docs)`, `ignoreLike(Item... docs)`, `ignoreLike(String... likeText)`, `addItem(Item... likeItems)` have been removed. ===== GeoDistanceQueryBuilder Removing individual setters for lon() and lat() values, both values should be set together using point(lon, lat). ===== GeoDistanceRangeQueryBuilder Removing setters for to(Object ...) and from(Object ...) in favour of the only two allowed input arguments (String, Number). Removing setter for center point (point(), geohash()) because parameter is mandatory and should already be set in constructor. Also removing setters for lt(), lte(), gt(), gte() since they can all be replaced by equivalent calls to to/from() and inludeLower()/includeUpper(). ===== GeoPolygonQueryBuilder Require shell of polygon already to be specified in constructor instead of adding it pointwise. This enables validation, but makes it necessary to remove the addPoint() methods. ===== MultiMatchQueryBuilder Moving MultiMatchQueryBuilder.ZeroTermsQuery enum to MatchQuery.ZeroTermsQuery. Also reusing new Operator enum. Removed ability to pass in boost value using `field(String field)` method in form e.g. `field^2`. Use the `field(String, float)` method instead. ===== MissingQueryBuilder The MissingQueryBuilder which was deprecated in 2.2.0 is removed. As a replacement use ExistsQueryBuilder inside a mustNot() clause. So instead of using `new ExistsQueryBuilder(name)` now use `new BoolQueryBuilder().mustNot(new ExistsQueryBuilder(name))`. ===== NotQueryBuilder The NotQueryBuilder which was deprecated in 2.1.0 is removed. As a replacement use BoolQueryBuilder with added mustNot() clause. So instead of using `new NotQueryBuilder(filter)` now use `new BoolQueryBuilder().mustNot(filter)`. ===== TermsQueryBuilder Remove the setter for `termsLookup()`, making it only possible to either use a TermsLookup object or individual values at construction time. Also moving individual settings for the TermsLookup (lookupIndex, lookupType, lookupId, lookupPath) to the separate TermsLookup class, using constructor only and moving checks for validation there. Removed `TermsLookupQueryBuilder` in favour of `TermsQueryBuilder`. ===== FunctionScoreQueryBuilder `add` methods have been removed, all filters and functions must be provided as constructor arguments by creating an array of `FunctionScoreQueryBuilder.FilterFunctionBuilder` objects, containing one element for each filter/function pair. `scoreMode` and `boostMode` can only be provided using corresponding enum members instead of string values: see `FilterFunctionScoreQuery.ScoreMode` and `CombineFunction`. `CombineFunction.MULT` has been renamed to `MULTIPLY`. ===== IdsQueryBuilder For simplicity, only one way of adding the ids to the existing list (empty by default) is left: `addIds(String...)` ===== ShapeBuilders `InternalLineStringBuilder` is removed in favour of `LineStringBuilder`, `InternalPolygonBuilder` in favour of PolygonBuilder` and `Ring` has been replaced with `LineStringBuilder`. Also the abstract base classes `BaseLineStringBuilder` and `BasePolygonBuilder` haven been merged with their corresponding implementations. ===== RescoreBuilder `RecoreBuilder.Rescorer` was merged with `RescoreBuilder`, which now is an abstract superclass. QueryRescoreBuilder currently is its only implementation. ===== PhraseSuggestionBuilder The inner DirectCandidateGenerator class has been moved out to its own class called DirectCandidateGeneratorBuilder. ===== SortBuilders The `sortMode` setter in `FieldSortBuilder`, `GeoDistanceSortBuilder` and `ScriptSortBuilder` now accept a `SortMode` enum instead of a String constant. Also the getter returns the same enum type. ===== SuggestBuilder The `setText` method has been changed to `setGlobalText` to make the intent more clear, and a `getGlobalText` method has been added. The `addSuggestion` method now required the user specified suggestion name, previously used in the ctor of each suggestion. ===== SuggestionBuilder The `field` setter has been deleted. Instead the field name needs to be specified as constructor argument. ==== SearchSourceBuilder All methods which take an `XContentBuilder`, `BytesReference` `Map` or `bytes[]` have been removed in favor of providing the relevant builder object for that feature (e.g. `HighlightBuilder`, `AggregationBuilder`, `SuggestBuilder`) . This means that all search requests can now be validated at call time which results in much clearer errors. The `defaultResourceWindowSize(int)` method has been removed. The window size should be set explicitly on all `RescoreBuilder` objects. ==== SearchRequestBuilder All methods which take an `XContentBuilder`, `BytesReference` `Map` or `bytes[]` have been removed in favor of providing the relevant builder object for that feature (e.g. `HighlightBuilder`, `AggregationBuilder`, `SuggestBuilder`) . This means that all search requests can now be validated at call time which results in much clearer errors. All highlighter methods have been removed in favor of a single `highlighter(HighlightBuilder)` method. The `setExtraSource(SearchSourceBuilder)` method has been removed. The `setTemplateSource(String)` and `setTemplateSource(BytesReference)` methods have been removed. Use `setTemplate(Template)` instead. `setRescorer(Rescorer)` and `setRescorer(Rescorer, int)` have been removed infavor of `setRescorer(RescoreBuilder)` and `setRescorer(RescoreBuilder, int)` ==== SearchRequest All `template` methods have been removed in favor of a single `template(Template)` method. All `source` methods have been removed in favor of a single `source(SearchSourceBuilder)` method. This means that all search requests can now be validated at call time which results in much clearer errors. All `extraSource` methods have been removed. ==== SearchResponse Sort values for `string` fields are now return as `java.lang.String` objects rather than `org.elasticsearch.common.text.Text`. ==== AggregationBuilder All methods which take an `XContentBuilder`, `BytesReference` `Map` or `bytes[]` have been removed in favor of providing the relevant builder object (i.e. `subAggregation(AggregationBuilder)` or `subAggregation(PipelineAggregationBuilder)`). This means that all requests can now be validated at call time which results in much clearer errors. ==== ValidateQueryRequest `source(QuerySourceBuilder)`, `source(Map)`, `source(XContentBuilder)`, `source(String)`, `source(byte[])`, `source(byte[], int, int)`, `source(BytesReference)` and `source()` have been removed in favor of using `query(QueryBuilder)` and `query()` ==== ValidateQueryRequestBuilder `setSource()` methods have been removed in favor of using `setQuery(QueryBuilder)` ==== ExplainRequest `source(QuerySourceBuilder)`, `source(Map)`, `source(BytesReference)` and `source()` have been removed in favor of using `query(QueryBuilder)` and `query()` ==== ExplainRequestBuilder The `setQuery(BytesReference)` method have been removed in favor of using `setQuery(QueryBuilder)` === ClusterStatsResponse Removed the `getMemoryAvailable` method from `OsStats`, which could be previously accessed calling `clusterStatsResponse.getNodesStats().getOs().getMemoryAvailable()`.