From d0a754ed1f45da4ac843a82c73c14ad523bb3dc6 Mon Sep 17 00:00:00 2001
From: HenrikJannsen <boilingfrog@gmx.com>
Date: Mon, 30 Sep 2024 18:05:15 +0700
Subject: [PATCH] Make MemoryReport singleton and pin it to a field so that it
 does not get GC'ed

---
 .../bisq/application/ApplicationService.java  |  6 ++++--
 .../bisq1_bridge/Bisq1BridgeService.java      |  9 ++++++---
 .../bisq/common/platform/MemoryReport.java    | 19 +++++++++++++------
 3 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/application/src/main/java/bisq/application/ApplicationService.java b/application/src/main/java/bisq/application/ApplicationService.java
index 259eb78bdf..7bbf3a0f80 100644
--- a/application/src/main/java/bisq/application/ApplicationService.java
+++ b/application/src/main/java/bisq/application/ApplicationService.java
@@ -124,7 +124,8 @@ public Config(Path baseDir,
     protected final Config config;
     @Getter
     protected final PersistenceService persistenceService;
-
+    @SuppressWarnings("FieldCanBeLocal") // Pin it so that it does not get GC'ed
+    private final MemoryReport memoryReport;
     private FileLock instanceLock;
 
     public ApplicationService(String configFileName, String[] args) {
@@ -170,7 +171,8 @@ public ApplicationService(String configFileName, String[] args) {
             log.info("Using custom config file");
         }
 
-        MemoryReport.printPeriodically(config.getMemoryReportIntervalSec(), config.isIncludeThreadListInMemoryReport());
+        memoryReport = MemoryReport.getINSTANCE();
+        memoryReport.printPeriodically(config.getMemoryReportIntervalSec(), config.isIncludeThreadListInMemoryReport());
 
         DevMode.setDevMode(config.isDevMode());
 
diff --git a/apps/oracle-node-app/src/main/java/bisq/oracle_node/bisq1_bridge/Bisq1BridgeService.java b/apps/oracle-node-app/src/main/java/bisq/oracle_node/bisq1_bridge/Bisq1BridgeService.java
index a380876df5..9559bc9eac 100644
--- a/apps/oracle-node-app/src/main/java/bisq/oracle_node/bisq1_bridge/Bisq1BridgeService.java
+++ b/apps/oracle-node-app/src/main/java/bisq/oracle_node/bisq1_bridge/Bisq1BridgeService.java
@@ -107,6 +107,8 @@ public static Bisq1BridgeService.Config from(com.typesafe.config.Config config)
 
     @Nullable
     private Scheduler periodicRequestDoaDataScheduler, initialDelayScheduler;
+    @SuppressWarnings("FieldCanBeLocal") // Pin it so that it does not get GC'ed
+    private final MemoryReport memoryReport;
 
     public Bisq1BridgeService(Config config,
                               NetworkService networkService,
@@ -127,6 +129,7 @@ public Bisq1BridgeService(Config config,
         httpService = new Bisq1BridgeHttpService(httpServiceConfig, networkService);
 
         persistence = persistenceService.getOrCreatePersistence(this, DbSubDirectory.PRIVATE, persistableStore);
+        memoryReport = MemoryReport.getINSTANCE();
     }
 
 
@@ -219,11 +222,11 @@ public void onAuthorizedDataAdded(AuthorizedData authorizedData) {
     private void initialRepublish() {
         log.info("Start republishAuthorizedBondedRoles");
         republishAuthorizedBondedRoles();
-        MemoryReport.logReport();
+        memoryReport.logReport();
         log.info("Completed republishAuthorizedBondedRoles");
         log.info("Start request and publish DaoData");
         requestDaoData().join(); // takes about 6 minutes for 500 items
-        MemoryReport.logReport();
+        memoryReport.logReport();
         log.info("Completed request and publish DaoData");
         periodicRequestDoaDataScheduler = Scheduler.run(this::periodicRepublish)
                 .host(this)
@@ -234,7 +237,7 @@ private void initialRepublish() {
     private void periodicRepublish() {
         log.info("periodicRequestDoaDataScheduler: Start requestDoaData");
         requestDaoData().join();
-        MemoryReport.logReport();
+        memoryReport.logReport();
         log.info("periodicRequestDoaDataScheduler: Completed requestDoaData");
     }
 
diff --git a/common/src/main/java/bisq/common/platform/MemoryReport.java b/common/src/main/java/bisq/common/platform/MemoryReport.java
index 1ea3663e3e..57b7e0bcd9 100644
--- a/common/src/main/java/bisq/common/platform/MemoryReport.java
+++ b/common/src/main/java/bisq/common/platform/MemoryReport.java
@@ -22,6 +22,7 @@
 import bisq.common.threading.ThreadProfiler;
 import bisq.common.timer.Scheduler;
 import bisq.common.util.StringUtils;
+import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 
 import java.util.Comparator;
@@ -30,21 +31,27 @@
 
 @Slf4j
 public class MemoryReport {
-    private static Scheduler scheduler;
-    private static boolean includeThreadListInMemoryReport;
+    @Getter
+    private static final MemoryReport INSTANCE = new MemoryReport();
 
-    public static void printPeriodically(int memoryReportIntervalSec, boolean includeThreadListInMemoryReport) {
-        MemoryReport.includeThreadListInMemoryReport = includeThreadListInMemoryReport;
+    private Scheduler scheduler;
+    private boolean includeThreadListInMemoryReport;
+
+    public MemoryReport() {
+    }
+
+    public void printPeriodically(int memoryReportIntervalSec, boolean includeThreadListInMemoryReport) {
+        this.includeThreadListInMemoryReport = includeThreadListInMemoryReport;
         if (scheduler != null) {
             scheduler.stop();
         }
-        scheduler = Scheduler.run(MemoryReport::logReport)
+        scheduler = Scheduler.run(this::logReport)
                 .host(MemoryReport.class)
                 .runnableName("logReport")
                 .periodically(30, memoryReportIntervalSec, TimeUnit.SECONDS);
     }
 
-    public static void logReport() {
+    public void logReport() {
         Runtime runtime = Runtime.getRuntime();
         long free = runtime.freeMemory();
         long total = runtime.totalMemory();