LMS-414 'WatermarkSelfTestable' moved to 'common' package.

SVN: 6006

common/source/java/ch/systemsx/cisd/common/utilities/WatermarkSelfTestable.java

+/*
+ * Copyright 2008 ETH Zuerich, CISD
+ *
+ * Licensed 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 ch.systemsx.cisd.common.utilities;
+
+import java.io.File;
+import java.io.IOException;
+
+import ch.systemsx.cisd.common.exceptions.ConfigurationFailureException;
+import ch.systemsx.cisd.common.exceptions.EnvironmentFailureException;
+import ch.systemsx.cisd.common.utilities.WatermarkWatcher.WatermarkState;
+
+/**
+ * An <code>ISelfTestable</code> implementation based on {@link WatermarkWatcher}.
+ * 
+ * @author Christian Ribeaud
+ */
+public final class WatermarkSelfTestable implements ISelfTestable
+{
+
+    private final File path;
+
+    private final WatermarkWatcher watermarkWatcher;
+
+    public WatermarkSelfTestable(final File path, final WatermarkWatcher watermarkWatcher)
+    {
+        this.path = path;
+        this.watermarkWatcher = watermarkWatcher;
+    }
+
+    //
+    // ISelfTestable
+    //
+
+    public final void check() throws EnvironmentFailureException, ConfigurationFailureException
+    {
+        try
+        {
+            final WatermarkState watermarkState = watermarkWatcher.getWatermarkState(path);
+            if (WatermarkWatcher.isBelow(watermarkState))
+            {
+                final String freeSpaceDisplayed =
+                        WatermarkWatcher.displayKilobyteValue(watermarkState.getFreeSpace());
+                final String watermarkDisplayed =
+                        WatermarkWatcher.displayKilobyteValue(watermarkState.getWatermark());
+                throw ConfigurationFailureException.fromTemplate(
+                        "Free space (%s) lies below given watermark (%s).", freeSpaceDisplayed,
+                        watermarkDisplayed);
+            }
+        } catch (IOException ex)
+        {
+            throw new EnvironmentFailureException(ex.getMessage());
+        }
+    }
+}
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