SLCORE-858 SonarLint storage is growing after restart

backend/core/src/main/java/org/sonarsource/sonarlint/core/local/only/XodusLocalOnlyIssueStore.java

@@ -51,9 +51,12 @@
 import org.sonarsource.sonarlint.core.serverconnection.storage.UuidBinding;
 
 import static java.util.Objects.requireNonNull;
+import static org.sonarsource.sonarlint.core.storage.XodusPurgeUtils.purgeOldTemporaryFiles;
 
 public class XodusLocalOnlyIssueStore {
 
+  private static final String LOCAL_ONLY_ISSUE = "xodus-local-only-issue-store";
+  private static final Integer PURGE_NUMBER_OF_DAYS = 3;
   private static final String CONFIGURATION_SCOPE_ID_ENTITY_TYPE = "Scope";
   private static final String CONFIGURATION_SCOPE_ID_TO_FILES_LINK_NAME = "files";
   private static final String FILE_ENTITY_TYPE = "File";
@@ -81,7 +84,8 @@ public class XodusLocalOnlyIssueStore {
   private static final SonarLintLogger LOG = SonarLintLogger.get();
 
   public XodusLocalOnlyIssueStore(Path backupDir, Path workDir) throws IOException {
-    xodusDbDir = Files.createTempDirectory(workDir, "xodus-local-only-issue-store");
+    xodusDbDir = Files.createTempDirectory(workDir, LOCAL_ONLY_ISSUE);
+    purgeOldTemporaryFiles(workDir, PURGE_NUMBER_OF_DAYS, LOCAL_ONLY_ISSUE + "*");
     backupFile = backupDir.resolve(BACKUP_TAR_GZ);
     if (Files.isRegularFile(backupFile)) {
       LOG.debug("Restoring previous local-only issue database from {}", backupFile);

backend/core/src/main/java/org/sonarsource/sonarlint/core/storage/XodusPurgeUtils.java

@@ -0,0 +1,53 @@
+/*
+ * SonarLint Core - Implementation
+ * Copyright (C) 2016-2024 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonarsource.sonarlint.core.storage;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Date;
+import org.apache.commons.io.FileUtils;
+import org.sonarsource.sonarlint.core.commons.log.SonarLintLogger;
+
+public class XodusPurgeUtils {
+
+  private XodusPurgeUtils() {
+    // Static class
+  }
+
+  private static final SonarLintLogger LOG = SonarLintLogger.get();
+
+  public static void purgeOldTemporaryFiles(Path workDir, Integer purgeDays, String pattern) {
+    if (Files.exists(workDir)) {
+      try (var stream = Files.newDirectoryStream(workDir, pattern)) {
+        for (var path : stream) {
+          var file = path.toFile();
+          var diff = new Date().getTime() - file.lastModified();
+          if (diff > purgeDays * 24 * 60 * 60 * 1000) {
+            FileUtils.deleteQuietly(file);
+            LOG.debug("Successfully purged " + path);
+          }
+        }
+      } catch (Exception e) {
+        LOG.error("Unable to purge old temporary files for pattern " + pattern);
+      }
+    }
+  }
+
+}

backend/core/src/main/java/org/sonarsource/sonarlint/core/tracking/XodusKnownFindingsStore.java

@@ -48,9 +48,12 @@
 import org.sonarsource.sonarlint.core.serverconnection.storage.UuidBinding;
 
 import static java.util.Objects.requireNonNull;
+import static org.sonarsource.sonarlint.core.storage.XodusPurgeUtils.purgeOldTemporaryFiles;
 
 public class XodusKnownFindingsStore {
 
+  private static final String KNOWN_FINDINGS_STORE = "known-findings-store";
+  private static final Integer PURGE_NUMBER_OF_DAYS = 3;
   private static final String CONFIGURATION_SCOPE_ID_ENTITY_TYPE = "Scope";
   private static final String CONFIGURATION_SCOPE_ID_TO_FILES_LINK_NAME = "files";
   private static final String FILE_ENTITY_TYPE = "File";
@@ -78,7 +81,8 @@ public class XodusKnownFindingsStore {
   private static final SonarLintLogger LOG = SonarLintLogger.get();
 
   public XodusKnownFindingsStore(Path backupDir, Path workDir) throws IOException {
-    xodusDbDir = Files.createTempDirectory(workDir, "known-findings-store");
+    xodusDbDir = Files.createTempDirectory(workDir, KNOWN_FINDINGS_STORE);
+    purgeOldTemporaryFiles(workDir, PURGE_NUMBER_OF_DAYS, KNOWN_FINDINGS_STORE + "*");
     backupFile = backupDir.resolve(BACKUP_TAR_GZ);
     if (Files.isRegularFile(backupFile)) {
       LOG.debug("Restoring previous known findings database from {}", backupFile);

backend/core/src/test/java/org/sonarsource/sonarlint/core/local/only/XodusKnownFindingsStoreTests.java

@@ -20,6 +20,7 @@
 package org.sonarsource.sonarlint.core.local.only;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
@@ -173,6 +174,19 @@ void should_not_load_a_known_hotspot_if_config_scope_id_is_wrong() {
     assertThat(storedSecurityHotspot).isEmpty();
   }
 
+  @Test
+  void should_purge_old_folders() throws IOException {
+    store.close();
+    var oldFile = Files.createTempFile(workDir, "known-findings-store", UUID.randomUUID().toString());
+    var file = oldFile.toFile();
+    var oneWeekAgo = System.currentTimeMillis() - 7L * 24 * 60 * 60 * 1000;
+    file.setLastModified(oneWeekAgo);
+
+    store = new XodusKnownFindingsStore(backupDir, workDir);
+
+    assertThat(Files.exists(oldFile)).isFalse();
+  }
+
   @NotNull
   private static KnownFinding aKnownFinding(String serverKey) {
     return new KnownFinding(UUID.randomUUID(), serverKey, new TextRangeWithHash(1, 2, 3, 4, "hash"), new LineWithHash(1, "lineHash"), "ruleKey", "message",

backend/core/src/test/java/org/sonarsource/sonarlint/core/local/only/XodusLocalOnlyIssueStoreTests.java

@@ -20,7 +20,9 @@
 package org.sonarsource.sonarlint.core.local.only;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.UUID;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -135,5 +137,17 @@ void should_reopen_all_issues_for_file() {
     assertThat(store.loadForFile("configScopeId",  Path.of("file/path"))).isEmpty();
   }
 
+  @Test
+  void should_purge_old_folders() throws IOException {
+    store.close();
+    var oldFile = Files.createTempFile(workDir, "xodus-local-only-issue-store", UUID.randomUUID().toString());
+    var file = oldFile.toFile();
+    var oneWeekAgo = System.currentTimeMillis() - 7L * 24 * 60 * 60 * 1000;
+    file.setLastModified(oneWeekAgo);
+
+    store = new XodusLocalOnlyIssueStore(backupDir, workDir);
+
+    assertThat(Files.exists(oldFile)).isFalse();
+  }
 
 }