feat: get all flags/segments as json string (#26)

Author: dsun0720

README.md

@@ -31,14 +31,14 @@ JAVA Server Side SDK is based on Java SE 8 and is available on Maven Central. Yo
     <dependency>
       <groupId>co.featbit</groupId>
       <artifactId>featbit-java-sdk</artifactId>
-      <version>1.4.4</version>
+      <version>1.4.5</version>
     </dependency>
 </dependencies>
 ```
 
 - Install the SDK using Gradle
 ```
-implementation 'co.featbit:featbit-java-sdk:1.4.4'
+implementation 'co.featbit:featbit-java-sdk:1.4.5'
 ```
 
 ### Prerequisite
@@ -286,6 +286,10 @@ Collection<String> flagKeys = states.getFlagKeys();
 // flag evaluations 
 EvalDetail<String> detail = states.getStringDetail("flag key", user, "Not Found");
 String value = states.getString("flag key", user, "Not Found");
+
+// get all flags/segments as json string
+String json = client.getAllDataAsJson();
+
 ```
 
 > If evaluation called before Java SDK client initialized, you set the wrong flag key/user for the evaluation or the related feature flag

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>co.featbit</groupId>
     <artifactId>featbit-java-sdk</artifactId>
-    <version>1.4.4</version>
+    <version>1.4.5</version>
 
     <name>featbit/featbit-java-sdk</name>
 

src/main/java/co/featbit/server/DataModel.java

@@ -4,7 +4,6 @@
 import co.featbit.server.exterior.DataStorageTypes;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableMap;
-import com.google.gson.annotations.Expose;
 import com.google.gson.annotations.JsonAdapter;
 import com.google.gson.reflect.TypeToken;
 import org.apache.commons.lang3.StringUtils;
@@ -168,9 +167,7 @@ Map<DataStorageTypes.Category, Map<String, DataStorageTypes.Item>> toStorageType
     static class Segment implements DataStorageTypes.Item, JsonHelper.AfterJsonParseDeserializable {
         private final String id;
         private final Boolean isArchived;
-        @Expose(serialize = false)
         final Date updatedAt;
-        @Expose(deserialize = false)
         private Long timestamp;
         private final List<String> included;
         private final List<String> excluded;
@@ -247,9 +244,7 @@ public int compareTo(@NotNull DataStorageTypes.Item o) {
     @JsonAdapter(JsonHelper.AfterJsonParseDeserializableTypeAdapterFactory.class)
     static class FeatureFlag implements DataStorageTypes.Item, JsonHelper.AfterJsonParseDeserializable {
         final String id;
-        @Expose(serialize = false)
         final Date updatedAt;
-        @Expose(deserialize = false)
         private Long timestamp;
         private final boolean isArchived;
         private final boolean exptIncludeAllTargets;
@@ -262,8 +257,7 @@ static class FeatureFlag implements DataStorageTypes.Item, JsonHelper.AfterJsonP
         private final List<TargetRule> rules;
         private final Fallthrough fallthrough;
         private final String disabledVariationId;
-        @Expose(serialize = false, deserialize = false)
-        private Map<String, Variation> variationMap;
+        private transient Map<String, Variation> variationMap;
 
         FeatureFlag(String id, Date updatedAt, boolean isArchived, boolean exptIncludeAllTargets, boolean isEnabled, String name, String key, String variationType, List<Variation> variations, List<TargetUser> targetUsers, List<TargetRule> rules, Fallthrough fallthrough, String disabledVariationId) {
             this.id = id;
@@ -536,5 +530,22 @@ public String getDispatchKey() {
         }
     }
 
+    static class DataExposer {
+        private final List<FeatureFlag> featureFlags;
+        private final List<Segment> segments;
+
+        public DataExposer(List<FeatureFlag> featureFlags, List<Segment> segments) {
+            this.featureFlags = featureFlags;
+            this.segments = segments;
+        }
+
+        public List<FeatureFlag> getFeatureFlags() {
+            return featureFlags;
+        }
+
+        public List<Segment> getSegments() {
+            return segments;
+        }
+    }
 
 }

src/main/java/co/featbit/server/FBClientImp.java

@@ -12,9 +12,11 @@
 
 import java.io.IOException;
 import java.time.Duration;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.*;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 import static co.featbit.server.Evaluator.*;
 import static com.google.common.base.Preconditions.checkArgument;
@@ -404,4 +406,16 @@ public void trackMetrics(FBUser user, Map<String, Double> metrics) {
         insightProcessor.send(event);
     }
 
+    public String getAllDataAsJson() {
+        try {
+            List<DataModel.FeatureFlag> allFlags = this.storage.getAll(DataStorageTypes.FEATURES).values().stream().map(v -> (DataModel.FeatureFlag) v).collect(Collectors.toList());
+            List<DataModel.Segment> allSegments = this.storage.getAll(DataStorageTypes.SEGMENTS).values().stream().map(v -> (DataModel.Segment) v).collect(Collectors.toList());
+            DataModel.DataExposer allData = new DataModel.DataExposer(allFlags, allSegments);
+            return JsonHelper.serialize(allData);
+        } catch (Exception ex) {
+            logger.error("FB JAVA SDK: unexpected error in getAllDataAsJson", ex);
+        }
+        return null;
+    }
+
 }

src/main/java/co/featbit/server/exterior/FBClient.java

@@ -262,4 +262,11 @@ public interface FBClient extends Closeable {
      * @param metrics event name and numeric value in K/V
      */
     void trackMetrics(FBUser user, Map<String, Double> metrics);
+
+    /**
+     * Get all data as a json string
+     *
+     * @return all data as json string
+     */
+    String getAllDataAsJson();
 }