This closes #1264

artemis-jdbc-store/src/main/java/org/apache/activemq/artemis/jdbc/store/file/JDBCSequentialFile.java

@@ -99,7 +99,7 @@ public boolean exists() {
    }
 
    @Override
-   public synchronized void open() throws Exception {
+   public void open() throws Exception {
       try {
          if (!isOpen) {
             synchronized (writeLock) {
@@ -151,12 +151,14 @@ public void delete() throws IOException, InterruptedException, ActiveMQException
       }
    }
 
-   private synchronized int internalWrite(byte[] data, IOCallback callback) throws Exception {
+   private synchronized int internalWrite(byte[] data, IOCallback callback) {
       try {
          synchronized (writeLock) {
             int noBytes = dbDriver.writeToFile(this, data);
             seek(noBytes);
-            System.out.println("Write: ID: " + this.getId() + " FileName: " + this.getFileName() + size());
+            if (logger.isTraceEnabled()) {
+               logger.trace("Write: ID: " + this.getId() + " FileName: " + this.getFileName() + size());
+            }
             if (callback != null)
                callback.done();
             return noBytes;
@@ -169,42 +171,25 @@ private synchronized int internalWrite(byte[] data, IOCallback callback) throws
       return 0;
    }
 
-   public synchronized int internalWrite(ActiveMQBuffer buffer, IOCallback callback) throws Exception {
+   public synchronized int internalWrite(ActiveMQBuffer buffer, IOCallback callback) {
       byte[] data = new byte[buffer.readableBytes()];
       buffer.readBytes(data);
       return internalWrite(data, callback);
    }
 
-   private synchronized int internalWrite(ByteBuffer buffer, IOCallback callback) throws Exception {
+   private synchronized int internalWrite(ByteBuffer buffer, IOCallback callback) {
       return internalWrite(buffer.array(), callback);
    }
 
    private void scheduleWrite(final ActiveMQBuffer bytes, final IOCallback callback) {
-      executor.execute(new Runnable() {
-         @Override
-         public void run() {
-            try {
-               internalWrite(bytes, callback);
-            } catch (Exception e) {
-               logger.error(e);
-               // internalWrite will notify the CriticalIOErrorListener
-            }
-         }
+      executor.execute(() -> {
+         internalWrite(bytes, callback);
       });
    }
 
    private void scheduleWrite(final ByteBuffer bytes, final IOCallback callback) {
-      final SequentialFile file = this;
-      executor.execute(new Runnable() {
-         @Override
-         public void run() {
-            try {
-               internalWrite(bytes, callback);
-            } catch (Exception e) {
-               logger.error(e);
-               fileFactory.onIOError(e, "Error on JDBC file sync", file);
-            }
-         }
+      executor.execute(() -> {
+         internalWrite(bytes, callback);
       });
    }
 
@@ -292,19 +277,16 @@ public long position() {
    }
 
    @Override
-   public synchronized void close() throws Exception {
+   public void close() throws Exception {
       isOpen = false;
+      sync();
+      fileFactory.sequentialFileClosed(this);
    }
 
    @Override
    public void sync() throws IOException {
       final SimpleWaitIOCallback callback = new SimpleWaitIOCallback();
-      executor.execute(new Runnable() {
-         @Override
-         public void run() {
-            callback.done();
-         }
-      });
+      executor.execute(callback::done);
 
       try {
          callback.waitCompletion();

artemis-jdbc-store/src/main/java/org/apache/activemq/artemis/jdbc/store/file/JDBCSequentialFileFactory.java

@@ -21,10 +21,10 @@
 import java.nio.ByteBuffer;
 import java.sql.Connection;
 import java.sql.SQLException;
-import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.Executor;
 
 import org.apache.activemq.artemis.core.io.IOCriticalErrorListener;
@@ -34,6 +34,7 @@
 import org.apache.activemq.artemis.core.server.ActiveMQComponent;
 import org.apache.activemq.artemis.jdbc.store.sql.SQLProvider;
 import org.apache.activemq.artemis.journal.ActiveMQJournalLogger;
+import org.apache.activemq.artemis.utils.ConcurrentHashSet;
 import org.jboss.logging.Logger;
 
 public class JDBCSequentialFileFactory implements SequentialFileFactory, ActiveMQComponent {
@@ -42,7 +43,7 @@ public class JDBCSequentialFileFactory implements SequentialFileFactory, ActiveM
 
    private boolean started;
 
-   private final List<JDBCSequentialFile> files = new ArrayList<>();
+   private final Set<JDBCSequentialFile> files = new ConcurrentHashSet<>();
 
    private final Executor executor;
 
@@ -155,6 +156,14 @@ public SequentialFile createSequentialFile(String fileName) {
       return null;
    }
 
+   public void sequentialFileClosed(SequentialFile file) {
+      files.remove(file);
+   }
+
+   public int getNumberOfOpenFiles() {
+      return files.size();
+   }
+
    @Override
    public int getMaxIO() {
       return 1;

artemis-jdbc-store/src/main/java/org/apache/activemq/artemis/jdbc/store/file/JDBCSequentialFileFactoryDriver.java

@@ -117,6 +117,10 @@ public void openFile(JDBCSequentialFile file) throws SQLException {
       }
    }
 
+   void removeFile(JDBCSequentialFile file) {
+
+   }
+
    /**
     * Checks to see if a file with filename and extension exists.  If so returns the ID of the file or returns -1.
     *

artemis-jdbc-store/src/test/java/org/apache/activemq/artemis/jdbc/file/JDBCSequentialFileFactoryTest.java

@@ -20,11 +20,12 @@
 import java.sql.DriverManager;
 import java.sql.SQLException;
 import java.util.HashSet;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
@@ -41,6 +42,7 @@
 import org.apache.activemq.artemis.utils.ThreadLeakCheckRule;
 import org.apache.derby.jdbc.EmbeddedDriver;
 import org.junit.After;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -59,9 +61,11 @@ public class JDBCSequentialFileFactoryTest {
 
    private JDBCSequentialFileFactory factory;
 
+   private ExecutorService executor;
+
    @Before
    public void setup() throws Exception {
-      Executor executor = Executors.newSingleThreadExecutor(ActiveMQThreadFactory.defaultThreadFactory());
+      executor = Executors.newSingleThreadExecutor(ActiveMQThreadFactory.defaultThreadFactory());
 
       String connectionUrl = "jdbc:derby:target/data;create=true";
       String tableName = "FILES";
@@ -75,6 +79,7 @@ public void onIOException(Throwable code, String message, SequentialFile file) {
 
    @After
    public void tearDown() throws Exception {
+      executor.shutdown();
       factory.destroy();
    }
 
@@ -94,17 +99,26 @@ public void testJDBCFileFactoryStarted() throws Exception {
    @Test
    public void testCreateFiles() throws Exception {
       int noFiles = 100;
+      List<SequentialFile> files = new LinkedList<>();
+
       Set<String> fileNames = new HashSet<>();
       for (int i = 0; i < noFiles; i++) {
          String fileName = UUID.randomUUID().toString() + ".txt";
          fileNames.add(fileName);
          SequentialFile file = factory.createSequentialFile(fileName);
          // We create files on Open
          file.open();
+         files.add(file);
       }
 
       List<String> queryFileNames = factory.listFiles("txt");
       assertTrue(queryFileNames.containsAll(fileNames));
+
+      for (SequentialFile file: files) {
+         file.close();
+      }
+
+      Assert.assertEquals(0, factory.getNumberOfOpenFiles());
    }
 
    @Test