Make call-site for SQLite JVM wait more accurate

Affects issues:
- #3436

Plan/common/src/main/java/com/djrapitops/plan/storage/database/SQLDB.java

@@ -84,6 +84,7 @@ public abstract class SQLDB extends AbstractDatabase {
 
     private Supplier<ExecutorService> transactionExecutorServiceProvider;
     private ExecutorService transactionExecutor;
+    private static final ThreadLocal<StackTraceElement[]> TRANSACTION_ORIGIN = new ThreadLocal<>();
 
     private final AtomicInteger transactionQueueSize = new AtomicInteger(0);
     private final AtomicBoolean dropUnimportantTransactions = new AtomicBoolean(false);
@@ -345,13 +346,17 @@ public abstract class SQLDB extends AbstractDatabase {
         return accessLock.performDatabaseOperation(() -> query.executeQuery(this), transaction);
     }
 
+    public static ThreadLocal<StackTraceElement[]> getTransactionOrigin() {
+        return TRANSACTION_ORIGIN;
+    }
+
     @Override
     public CompletableFuture<?> executeTransaction(Transaction transaction) {
         if (getState() == State.CLOSED) {
             throw new DBClosedException("Transaction tried to execute although database is closed.");
         }
 
-        Exception origin = new Exception();
+        StackTraceElement[] origin = Thread.currentThread().getStackTrace();
 
         if (determineIfShouldDropUnimportantTransactions(transactionQueueSize.incrementAndGet())
                 && transaction instanceof ThrowawayTransaction) {
@@ -361,6 +366,7 @@ public abstract class SQLDB extends AbstractDatabase {
 
         return CompletableFuture.supplyAsync(() -> {
             try {
+                TRANSACTION_ORIGIN.set(origin);
                 if (getState() == State.CLOSED) return CompletableFuture.completedFuture(null);
 
                 accessLock.performDatabaseOperation(() -> {
@@ -369,6 +375,7 @@ public abstract class SQLDB extends AbstractDatabase {
                 return CompletableFuture.completedFuture(null);
             } finally {
                 transactionQueueSize.decrementAndGet();
+                TRANSACTION_ORIGIN.remove();
             }
         }, getTransactionExecutor()).exceptionally(errorHandler(transaction, origin));
     }
@@ -389,7 +396,7 @@ public abstract class SQLDB extends AbstractDatabase {
         return dropTransactions;
     }
 
-    private Function<Throwable, CompletableFuture<Object>> errorHandler(Transaction transaction, Exception origin) {
+    private Function<Throwable, CompletableFuture<Object>> errorHandler(Transaction transaction, StackTraceElement[] origin) {
         return throwable -> {
             if (throwable == null) {
                 return CompletableFuture.completedFuture(null);

Plan/common/src/main/java/com/djrapitops/plan/storage/database/SQLiteDB.java

@@ -76,7 +76,7 @@ public class SQLiteDB extends SQLDB {
         super(() -> serverInfo.get().getServerUUID(), locale, config, files, runnableFactory, logger, errorLogger);
         dbName = databaseFile.getName();
         this.databaseFile = databaseFile;
-        connectionLock = new SemaphoreAccessCounter(config);
+        connectionLock = new SemaphoreAccessCounter();
     }
 
     @Override

Plan/common/src/main/java/com/djrapitops/plan/utilities/SemaphoreAccessCounter.java

@@ -16,7 +16,8 @@
  */
 package com.djrapitops.plan.utilities;
 
-import com.djrapitops.plan.settings.config.PlanConfig;
+import com.djrapitops.plan.storage.database.SQLDB;
+import com.djrapitops.plan.utilities.java.ThrowableUtils;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
@@ -27,14 +28,11 @@ import java.util.logging.Logger;
 
 public class SemaphoreAccessCounter {
 
-    private final PlanConfig config;
-
     private final AtomicInteger accessCounter;
     private final Object lockObject;
     private final Collection<String> holds = Collections.newSetFromMap(new ConcurrentHashMap<>());
 
-    public SemaphoreAccessCounter(PlanConfig config) {
-        this.config = config;
+    public SemaphoreAccessCounter() {
         accessCounter = new AtomicInteger(0);
         lockObject = new Object();
     }
@@ -43,7 +41,11 @@ public class SemaphoreAccessCounter {
     private static String getAccessingThing() {
         boolean previousWasAccess = false;
         List<StackTraceElement> accessors = new ArrayList<>();
-        for (StackTraceElement e : Thread.currentThread().getStackTrace()) {
+        StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
+        StackTraceElement[] origin = SQLDB.getTransactionOrigin().get();
+        StackTraceElement[] callSite = ThrowableUtils.combineStackTrace(origin, stackTrace);
+
+        for (StackTraceElement e : callSite) {
             if (previousWasAccess) {
                 accessors.add(e);
                 previousWasAccess = false;
@@ -54,7 +56,7 @@ public class SemaphoreAccessCounter {
                 previousWasAccess = true;
             }
         }
-        if (accessors.isEmpty()) accessors.addAll(Arrays.asList(Thread.currentThread().getStackTrace()));
+        if (accessors.isEmpty()) accessors.addAll(Arrays.asList(callSite));
         return accessors.toString();
     }
 

Plan/common/src/main/java/com/djrapitops/plan/utilities/java/ThrowableUtils.java

@@ -16,6 +16,8 @@
  */
 package com.djrapitops.plan.utilities.java;
 
+import org.jetbrains.annotations.NotNull;
+
 import java.util.Arrays;
 import java.util.stream.Stream;
 
@@ -30,20 +32,29 @@ public class ThrowableUtils {
         /* Static method class */
     }
 
-    public static void appendEntryPointToCause(Throwable throwable, Throwable originPoint) {
+    public static void appendEntryPointToCause(Throwable throwable, StackTraceElement[] originPoint) {
         Throwable cause = throwable.getCause();
         while (cause.getCause() != null) {
             cause = cause.getCause();
         }
 
         cause.setStackTrace(
-                Stream.concat(
-                        Arrays.stream(cause.getStackTrace()),
-                        Arrays.stream(originPoint.getStackTrace())
-                ).toArray(StackTraceElement[]::new)
+                combineStackTrace(originPoint, cause.getStackTrace())
         );
     }
 
+    @NotNull
+    public static StackTraceElement[] combineStackTrace(StackTraceElement[] originPoint, StackTraceElement[] cause) {
+        if (originPoint == null && cause == null) return new StackTraceElement[0];
+        if (originPoint == null) return cause;
+        if (cause == null) return originPoint;
+
+        return Stream.concat(
+                Arrays.stream(cause),
+                Arrays.stream(originPoint)
+        ).toArray(StackTraceElement[]::new);
+    }
+
     public static String findCallerAfterClass(StackTraceElement[] stackTrace, Class<?> afterThis) {
         boolean found = false;
         for (StackTraceElement stackTraceElement : stackTrace) {