https://issues.apache.org/jira/browse/AMQ-4819

activemq-broker/src/main/java/org/apache/activemq/usage/SystemUsage.java

@@ -41,6 +41,7 @@ public class SystemUsage implements Service {
     private TempUsage tempUsage;
     private ThreadPoolExecutor executor;
     private JobSchedulerUsage jobSchedulerUsage;
+    private String checkLimitsLogLevel = "warn";
 
     /**
      * True if someone called setSendFailIfNoSpace() on this particular usage
@@ -283,4 +284,12 @@ public class SystemUsage implements Service {
             this.jobSchedulerUsage.setExecutor(this.executor);
         }
     }
+
+   public String getCheckLimitsLogLevel() {
+       return checkLimitsLogLevel;
+   }
+
+   public void setCheckLimitsLogLevel(String checkLimitsLogLevel) {
+       this.checkLimitsLogLevel = checkLimitsLogLevel;
+   }
 }

activemq-kahadb-store/src/main/java/org/apache/activemq/store/kahadb/scheduler/JobSchedulerStoreImpl.java

@@ -30,11 +30,8 @@ import java.util.Map.Entry;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 
-import org.apache.activemq.broker.LockableServiceSupport;
-import org.apache.activemq.broker.Locker;
 import org.apache.activemq.broker.scheduler.JobScheduler;
 import org.apache.activemq.broker.scheduler.JobSchedulerStore;
-import org.apache.activemq.store.SharedFileLocker;
 import org.apache.activemq.store.kahadb.disk.index.BTreeIndex;
 import org.apache.activemq.store.kahadb.disk.journal.Journal;
 import org.apache.activemq.store.kahadb.disk.journal.Location;
@@ -48,10 +45,11 @@ import org.apache.activemq.util.ByteSequence;
 import org.apache.activemq.util.IOHelper;
 import org.apache.activemq.util.LockFile;
 import org.apache.activemq.util.ServiceStopper;
+import org.apache.activemq.util.ServiceSupport;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class JobSchedulerStoreImpl extends LockableServiceSupport implements JobSchedulerStore {
+public class JobSchedulerStoreImpl extends ServiceSupport implements JobSchedulerStore {
     static final Logger LOG = LoggerFactory.getLogger(JobSchedulerStoreImpl.class);
     private static final int DATABASE_LOCKED_WAIT_DELAY = 10 * 1000;
 
@@ -61,6 +59,7 @@ public class JobSchedulerStoreImpl extends LockableServiceSupport implements Job
     private File directory;
     PageFile pageFile;
     private Journal journal;
+    LockFile lockFile;
     protected AtomicLong journalSize = new AtomicLong(0);
     private boolean failIfDatabaseIsLocked;
     private int journalMaxFileLength = Journal.DEFAULT_MAX_FILE_LENGTH;
@@ -406,15 +405,4 @@ public class JobSchedulerStoreImpl extends LockableServiceSupport implements Job
     public String toString() {
         return "JobSchedulerStore:" + this.directory;
     }
-
-    @Override
-    public Locker createDefaultLocker() throws IOException {
-        SharedFileLocker locker = new SharedFileLocker();
-        locker.configure(this);
-        return locker;
-    }
-
-    @Override
-    public void init() throws Exception {
-    }
 }

activemq-unit-tests/src/test/java/org/apache/activemq/usage/StoreUsageLimitsTest.java

@@ -0,0 +1,75 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.activemq.usage;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.Charset;
+
+import org.apache.activemq.EmbeddedBrokerTestSupport;
+import org.apache.activemq.broker.BrokerService;
+
+public class StoreUsageLimitsTest extends EmbeddedBrokerTestSupport {
+
+    final int WAIT_TIME_MILLS = 20 * 1000;
+    private static final String limitsLogLevel = "error";
+
+    @Override
+    protected BrokerService createBroker() throws Exception {
+        BrokerService broker = super.createBroker();
+        broker.getSystemUsage().getMemoryUsage().setLimit(Long.MAX_VALUE);
+        broker.getSystemUsage().setCheckLimitsLogLevel(limitsLogLevel);
+        broker.deleteAllMessages();
+        return broker;
+    }
+
+    @Override
+    protected boolean isPersistent() {
+        return true;
+    }
+
+    public void testCheckLimitsLogLevel() throws Exception {
+
+        File file = new File("target/activemq-test.log");
+        if (!file.exists()) {
+            fail("target/activemq-test.log was not created.");
+        }
+
+        BufferedReader br = null;
+        boolean foundUsage = false;
+
+        try {
+            br = new BufferedReader(new InputStreamReader(new FileInputStream(file), Charset.forName("UTF-8")));
+            String line = null;
+            while ((line = br.readLine()) != null) {
+                if (line.contains(new String(Long.toString(Long.MAX_VALUE / (1024 * 1024)))) && line.contains(limitsLogLevel.toUpperCase())) {
+                    foundUsage = true;
+                }
+            }
+        } catch (Exception e) {
+            fail(e.getMessage());
+        } finally {
+            br.close();
+        }
+
+        if (!foundUsage)
+            fail("checkLimitsLogLevel message did not write to log target/activemq-test.log");
+    }
+}