feat: Added a chart to display global Health Check average\nThis closes

gravitee-io/issues#889

src/main/java/io/gravitee/repository/analytics/query/response/histogram/Data.java

@@ -23,18 +23,18 @@ public class Data {
 
     private final long timestamp;
 
-    private final long count;
+    private final Number value;
 
-    public Data(long timestamp, long count) {
+    public Data(long timestamp, Number value) {
         this.timestamp = timestamp;
-        this.count = count;
+        this.value = value;
     }
 
     public long timestamp() {
         return timestamp;
     }
 
-    public long count() {
-        return count;
+    public Number value() {
+        return value;
     }
 }

src/main/java/io/gravitee/repository/healthcheck/query/AbstractQuery.java

@@ -15,6 +15,8 @@
  */
 package io.gravitee.repository.healthcheck.query;
 
+import io.gravitee.repository.analytics.query.TimeRangeFilter;
+
 /**
  * @author David BRASSELY (david.brassely at graviteesource.com)
  * @author GraviteeSource Team
@@ -23,6 +25,8 @@ public abstract class AbstractQuery<T extends Response> implements Query<T> {
 
     private RootFilter rootFilter;
 
+    private TimeRangeFilter timeRangeFilter;
+
     private QueryFilter queryFilter;
 
     public RootFilter root() {
@@ -33,6 +37,14 @@ void root(RootFilter rootFilter) {
         this.rootFilter = rootFilter;
     }
 
+    public TimeRangeFilter timeRange() {
+        return timeRangeFilter;
+    }
+
+    void timeRange(TimeRangeFilter timeRangeFilter) {
+        this.timeRangeFilter = timeRangeFilter;
+    }
+
     public QueryFilter query() {
         return queryFilter;
     }

src/main/java/io/gravitee/repository/healthcheck/query/AbstractQueryBuilder.java

@@ -15,6 +15,10 @@
  */
 package io.gravitee.repository.healthcheck.query;
 
+import io.gravitee.repository.analytics.query.DateRange;
+import io.gravitee.repository.analytics.query.Interval;
+import io.gravitee.repository.analytics.query.TimeRangeFilter;
+
 /**
  * @author David BRASSELY (david.brassely at graviteesource.com)
  * @author GraviteeSource Team
@@ -40,9 +44,22 @@ public QB query(String query) {
         return (QB) this;
     }
 
+    public QB timeRange(DateRange dateRange, Interval interval) {
+        this.query.timeRange(new TimeRangeFilter(dateRange, interval));
+        return (QB) this;
+    }
+
     public QB api(String api) {
         this.query.root(new RootFilter("api", api));
 
         return (QB) this;
     }
+
+    public QB root(String field, String id) {
+        if (field != null && id != null) {
+            this.query.root(new RootFilter(field, id));
+        }
+
+        return (QB) this;
+    }
 }

src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQuery.java

@@ -0,0 +1,40 @@
+/**
+ * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.gravitee.repository.healthcheck.query;
+
+import io.gravitee.repository.analytics.query.Aggregation;
+import io.gravitee.repository.healthcheck.query.response.histogram.DateHistogramResponse;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author Azize ELAMRANI (azize.elamrani at graviteesource.com)
+ * @author GraviteeSource Team
+ */
+public class DateHistogramQuery extends AbstractQuery<DateHistogramResponse> {
+
+    private List<Aggregation> aggregations = new ArrayList<>();
+
+    @Override
+    public Class<DateHistogramResponse> responseType() {
+        return DateHistogramResponse.class;
+    }
+
+    public List<Aggregation> aggregations() {
+        return aggregations;
+    }
+}

src/main/java/io/gravitee/repository/healthcheck/query/DateHistogramQueryBuilder.java

@@ -0,0 +1,55 @@
+/**
+ * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.gravitee.repository.healthcheck.query;
+
+import io.gravitee.repository.analytics.query.Aggregation;
+import io.gravitee.repository.analytics.query.AggregationType;
+
+/**
+ * @author Azize ELAMRANI (azize.elamrani at graviteesource.com)
+ * @author GraviteeSource Team
+ */
+public class DateHistogramQueryBuilder extends AbstractQueryBuilder<DateHistogramQueryBuilder, DateHistogramQuery> {
+
+    protected DateHistogramQueryBuilder(DateHistogramQuery query) {
+        super(query);
+    }
+
+    static DateHistogramQueryBuilder query() {
+        return new DateHistogramQueryBuilder(new DateHistogramQuery());
+    }
+
+    public DateHistogramQueryBuilder aggregation(Aggregation aggregation) {
+        query.aggregations().add(aggregation);
+        return this;
+    }
+
+    public DateHistogramQueryBuilder aggregation(AggregationType type, String field) {
+        query.aggregations().add(new Aggregation() {
+            @Override
+            public AggregationType type() {
+                return type;
+            }
+
+            @Override
+            public String field() {
+                return field;
+            }
+        });
+
+        return this;
+    }
+}

src/main/java/io/gravitee/repository/healthcheck/query/QueryBuilders.java

@@ -36,4 +36,8 @@ public static AverageResponseTimeQueryBuilder responseTime() {
     public static LogsQueryBuilder logs() {
         return LogsQueryBuilder.query();
     }
+
+    public static DateHistogramQueryBuilder dateHistogram() {
+        return DateHistogramQueryBuilder.query();
+    }
 }

src/main/java/io/gravitee/repository/healthcheck/query/response/histogram/DateHistogramResponse.java

@@ -0,0 +1,40 @@
+/**
+ * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.gravitee.repository.healthcheck.query.response.histogram;
+
+import io.gravitee.repository.healthcheck.query.Response;
+import io.gravitee.repository.analytics.query.response.histogram.Bucket;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author Azize ELAMRANI (azize.elamrani at graviteesource.com)
+ * @author GraviteeSource Team
+ */
+public class DateHistogramResponse implements Response {
+
+    private final List<Long> timestamps = new ArrayList<>();
+    private final List<Bucket> values = new ArrayList<>();
+
+    public List<Bucket> values() {
+        return values;
+    }
+
+    public List<Long> timestamps() {
+        return timestamps;
+    }
+}