fix #849 modify query.highlihgt parameters

src/main/java/org/codelibs/fess/es/client/FessEsClient.java

@@ -871,7 +871,7 @@ public class FessEsClient implements Client {
             // highlighting
             HighlightBuilder highlightBuilder = new HighlightBuilder();
             queryHelper.highlightedFields(stream -> stream.forEach(hf -> highlightBuilder.field(hf,
-                    fessConfig.getQueryHighlightFragmentSizeAsInteger())));
+                    fessConfig.getQueryHighlightFragmentSizeAsInteger(), fessConfig.getQueryHighlightNumberOfFragmentsAsInteger())));
             searchRequestBuilder.highlighter(highlightBuilder);
 
             // facets

src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java

@@ -432,9 +432,12 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     /** The key of the configuration. e.g. true */
     String QUERY_REPLACE_TERM_WITH_PREFIX_QUERY = "query.replace.term.with.prefix.query";
 
-    /** The key of the configuration. e.g. 100 */
+    /** The key of the configuration. e.g. 50 */
     String QUERY_HIGHLIGHT_FRAGMENT_SIZE = "query.highlight.fragment.size";
 
+    /** The key of the configuration. e.g. 5 */
+    String QUERY_HIGHLIGHT_NUMBER_OF_FRAGMENTS = "query.highlight.number.of.fragments";
+
     /** The key of the configuration. e.g. 100000 */
     String QUERY_MAX_SEARCH_RESULT_OFFSET = "query.max.search.result.offset";
 
@@ -2314,19 +2317,34 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
 
     /**
      * Get the value for the key 'query.highlight.fragment.size'. <br>
-     * The value is, e.g. 100 <br>
+     * The value is, e.g. 50 <br>
      * @return The value of found property. (NotNull: if not found, exception but basically no way)
      */
     String getQueryHighlightFragmentSize();
 
     /**
      * Get the value for the key 'query.highlight.fragment.size' as {@link Integer}. <br>
-     * The value is, e.g. 100 <br>
+     * The value is, e.g. 50 <br>
      * @return The value of found property. (NotNull: if not found, exception but basically no way)
      * @throws NumberFormatException When the property is not integer.
      */
     Integer getQueryHighlightFragmentSizeAsInteger();
 
+    /**
+     * Get the value for the key 'query.highlight.number.of.fragments'. <br>
+     * The value is, e.g. 5 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getQueryHighlightNumberOfFragments();
+
+    /**
+     * Get the value for the key 'query.highlight.number.of.fragments' as {@link Integer}. <br>
+     * The value is, e.g. 5 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     * @throws NumberFormatException When the property is not integer.
+     */
+    Integer getQueryHighlightNumberOfFragmentsAsInteger();
+
     /**
      * Get the value for the key 'query.max.search.result.offset'. <br>
      * The value is, e.g. 100000 <br>
@@ -5102,6 +5120,14 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             return getAsInteger(FessConfig.QUERY_HIGHLIGHT_FRAGMENT_SIZE);
         }
 
+        public String getQueryHighlightNumberOfFragments() {
+            return get(FessConfig.QUERY_HIGHLIGHT_NUMBER_OF_FRAGMENTS);
+        }
+
+        public Integer getQueryHighlightNumberOfFragmentsAsInteger() {
+            return getAsInteger(FessConfig.QUERY_HIGHLIGHT_NUMBER_OF_FRAGMENTS);
+        }
+
         public String getQueryMaxSearchResultOffset() {
             return get(FessConfig.QUERY_MAX_SEARCH_RESULT_OFFSET);
         }

src/main/resources/fess_config.properties

@@ -204,7 +204,8 @@ query.max.length=1000
 query.geo.fields=location
 query.browser.lang.parameter.name=browser_lang
 query.replace.term.with.prefix.query=true
-query.highlight.fragment.size=100
+query.highlight.fragment.size=50
+query.highlight.number.of.fragments=5
 query.max.search.result.offset=100000
 query.additional.response.fields=
 query.additional.api.response.fields=