feat(events): make event serialization usable from another package

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/events/AggregatedEventSummarizer.java

@@ -16,10 +16,10 @@
  * Note that the methods of this class are deliberately not thread-safe, because they should
  * always be called from EventProcessor's single message-processing thread.
  */
-final class AggregatedEventSummarizer implements EventSummarizerInterface {
+public final class AggregatedEventSummarizer implements EventSummarizerInterface {
   private final EventSummarizer summarizer;
 
-  AggregatedEventSummarizer() {
+  public AggregatedEventSummarizer() {
     this.summarizer = new EventSummarizer();
   }
 

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/events/EventOutputFormatter.java

@@ -25,18 +25,28 @@
  * handling of context data and private attribute redaction is implemented in EventContextFormatter
  * and tested in more detail in EventContextFormatterTest.
  */
-final class EventOutputFormatter {
+public final class EventOutputFormatter {
   private final EventContextFormatter contextFormatter;
   private final boolean redactAnonymousAllEvents;
 
-  EventOutputFormatter(EventsConfiguration config) {
+  public EventOutputFormatter(EventsConfiguration config) {
     this.contextFormatter = new EventContextFormatter(
         config.allAttributesPrivate,
         config.privateAttributes.toArray(new AttributeRef[config.privateAttributes.size()]));
     this.redactAnonymousAllEvents = config.redactAnonymousAllEvents;
   }
 
-  int writeOutputEvents(Event[] events, List<EventSummarizer.EventSummary> summaries, Writer writer) throws IOException {
+  /**
+   * Writes events and summaries as the JSON array that makes up a request body.
+   *
+   * @param events the individual events to write
+   * @param summaries the summaries to write; empty ones are skipped
+   * @param writer where to write the JSON
+   * @return how many output events were written, counting each summary as one
+   * @throws IOException if the writer failed
+   */
+  public int writeOutputEvents(Event[] events, List<EventSummarizer.EventSummary> summaries, Writer writer)
+      throws IOException {
     int count = 0;
     JsonWriter jsonWriter = new JsonWriter(writer);
     jsonWriter.beginArray();

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/events/EventSummarizer.java

@@ -14,7 +14,7 @@
  * methods of this class are deliberately not thread-safe, because they should always
  * be called from EventProcessor's single message-processing thread.
  */
-final class EventSummarizer {
+public final class EventSummarizer {
   private EventSummary eventsState;
   private final LDContext context; // nullable - only set for per-context summarization
 
@@ -85,7 +85,10 @@ void clear() {
     eventsState = new EventSummary(context);
   }
 
-  static final class EventSummary {
+  /**
+   * A snapshot of the evaluations counted since the last reset.
+   */
+  public static final class EventSummary {
     final Map<String, FlagInfo> counters;
     long startDate;
     long endDate;

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/events/EventSummarizerInterface.java

@@ -13,7 +13,7 @@
  * Note that implementations are deliberately not thread-safe, as they should always
  * be called from EventProcessor's single message-processing thread.
  */
-interface EventSummarizerInterface {
+public interface EventSummarizerInterface {
   /**
    * Adds information about an evaluation to the summary.
    *

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/events/PerContextEventSummarizer.java

@@ -19,10 +19,10 @@
  * Note that the methods of this class are deliberately not thread-safe, because they should
  * always be called from EventProcessor's single message-processing thread.
  */
-final class PerContextEventSummarizer implements EventSummarizerInterface {
+public final class PerContextEventSummarizer implements EventSummarizerInterface {
   private final Map<LDContext, EventSummarizer> summarizersByContext;
 
-  PerContextEventSummarizer() {
+  public PerContextEventSummarizer() {
     this.summarizersByContext = new HashMap<>();
   }