--- a/agent/src/test/java/com/redhat/thermostat/TestUtils.java	Thu Mar 29 11:31:43 2012 -0400
+++ b/agent/src/test/java/com/redhat/thermostat/TestUtils.java	Thu Mar 29 16:52:29 2012 +0200
@@ -36,7 +36,19 @@
 
 package com.redhat.thermostat;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.lang.management.ManagementFactory;
+import java.util.Properties;
+import java.util.Random;
+
+import junit.framework.Assert;
+
+import org.junit.BeforeClass;
+
+import com.redhat.thermostat.agent.config.AgentProperties;
+import com.redhat.thermostat.backend.BackendsProperties;
 
 public class TestUtils {
 
@@ -49,5 +61,47 @@
     public static boolean isLinux() {
         return (System.getProperty("os.name").toLowerCase().contains("linux"));
     }
+        
+    public static String setupAgentConfigs() throws IOException {
+        // need to create dummy config files for the tests
+        Random random = new Random();
 
+        String tmpDir = System.getProperty("java.io.tmpdir") + File.separatorChar +
+                Math.abs(random.nextInt()) + File.separatorChar;
+
+        System.setProperty("THERMOSTAT_HOME", tmpDir);
+        File agent = new File(tmpDir, "agent");
+        agent.mkdirs();
+
+        File tmpConfigs = new File(agent, "agent.properties");
+
+        new File(agent, "run").mkdirs();
+        new File(agent, "logs").mkdirs();
+
+        File backends = new File(tmpDir, "backends");
+        File system = new File(backends, "system");
+        system.mkdirs();
+        
+        Properties props = new Properties();            
+
+        props.setProperty(AgentProperties.BACKENDS.name(), "system");
+        props.setProperty(AgentProperties.LOG_LEVEL.name(), "WARNING");
+
+        props.store(new FileOutputStream(tmpConfigs), "thermostat agent test properties");
+
+        // now write the configs for the backends
+        tmpConfigs = new File(system, "backend.properties");
+        props = new Properties();
+        props.setProperty(BackendsProperties.BACKEND_CLASS.name(),
+                          "com.redhat.thermostat.backend.system.SystemBackend");
+        props.setProperty(BackendsProperties.DESCRIPTION.name(),
+                          "fluff backend for tests");
+        props.setProperty(BackendsProperties.VENDOR.name(),
+                          "Red Hat, Inc.");
+        props.setProperty(BackendsProperties.VERSION.name(),
+                          "1.0");
+        props.store(new FileOutputStream(tmpConfigs), "thermostat system backend properties");
+        
+        return tmpDir;
+    }
 }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/src/main/java/com/redhat/thermostat/common/config/ConfigUtils.java	Thu Mar 29 16:52:29 2012 +0200
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2012 Red Hat, Inc.
+ *
+ * This file is part of Thermostat.
+ *
+ * Thermostat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * Thermostat 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Thermostat; see the file COPYING.  If not see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Linking this code with other modules is making a combined work
+ * based on this code.  Thus, the terms and conditions of the GNU
+ * General Public License cover the whole combination.
+ *
+ * As a special exception, the copyright holders of this code give
+ * you permission to link this code with independent modules to
+ * produce an executable, regardless of the license terms of these
+ * independent modules, and to copy and distribute the resulting
+ * executable under terms of your choice, provided that you also
+ * meet, for each linked independent module, the terms and conditions
+ * of the license of that module.  An independent module is a module
+ * which is not derived from or based on this code.  If you modify
+ * this code, you may extend this exception to your version of the
+ * library, but you are not obligated to do so.  If you do not wish
+ * to do so, delete this exception statement from your version.
+ */
+
+package com.redhat.thermostat.common.config;
+
+import java.io.File;
+
+public class ConfigUtils {
+
+    public static String getThermostatHome() throws InvalidConfigurationException {
+        // allow this to be specified also as a property, especially for
+        // tests, this overrides the env setting
+        String home = System.getProperty("THERMOSTAT_HOME");
+        if (home == null) {
+            home = System.getenv("THERMOSTAT_HOME");
+        }
+        
+        if (home == null) {
+            throw new InvalidConfigurationException("THERMOSTAT_HOME not defined...");
+        }
+        return home;
+    }
+    
+    public static File getBackendsBaseDirectory() throws InvalidConfigurationException {
+        String loc = getThermostatHome() + File.separatorChar + "backends";
+        File file = new File(loc);
+        return file;
+    }
+    
+    public static File getStorageBaseDirectory() throws InvalidConfigurationException {
+        String loc = getThermostatHome() + File.separatorChar + "storage";
+        File file = new File(loc);
+        return file;
+    }
+    
+    public static File getStorageDirectory() throws InvalidConfigurationException {
+        return new File(getStorageBaseDirectory(), "db");
+    }
+    
+    public static File getStorageConfigurationFile() throws InvalidConfigurationException {
+        return new File(getStorageBaseDirectory(), "db.properties");
+    }
+
+    public static File getStorageLogFile() throws InvalidConfigurationException {
+        File logDir = new File(getStorageBaseDirectory(), "logs");
+        File logFile = new File(logDir, "db.log");
+        
+        return logFile;
+    }
+
+    public static File getStoragePidFile() throws InvalidConfigurationException {
+        File logDir = new File(getStorageBaseDirectory(), "run");
+        File logFile = new File(logDir, "db.pid");
+        
+        return logFile;
+    }
+
+    public static File getBackendPropertyFile(String backendName)
+            throws InvalidConfigurationException
+    {
+        File backendsConfigDir = ConfigUtils.getBackendsBaseDirectory();
+        File backendConfig = new File(backendsConfigDir, backendName);
+        backendConfig = new File(backendConfig, "backend.properties");
+        if (!backendConfig.exists())
+            throw new InvalidConfigurationException("backends configuration " +
+                                                    "directory doesn't exist: " + 
+                                                    backendConfig);
+        return backendConfig;
+    }
+
+    public static File getAgentConfigurationFile() throws InvalidConfigurationException {
+
+        File agent = new File(getThermostatHome(), "agent");
+        return new File(agent, "agent.properties");
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/src/main/java/com/redhat/thermostat/common/config/InvalidConfigurationException.java	Thu Mar 29 16:52:29 2012 +0200
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012 Red Hat, Inc.
+ *
+ * This file is part of Thermostat.
+ *
+ * Thermostat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * Thermostat 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Thermostat; see the file COPYING.  If not see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Linking this code with other modules is making a combined work
+ * based on this code.  Thus, the terms and conditions of the GNU
+ * General Public License cover the whole combination.
+ *
+ * As a special exception, the copyright holders of this code give
+ * you permission to link this code with independent modules to
+ * produce an executable, regardless of the license terms of these
+ * independent modules, and to copy and distribute the resulting
+ * executable under terms of your choice, provided that you also
+ * meet, for each linked independent module, the terms and conditions
+ * of the license of that module.  An independent module is a module
+ * which is not derived from or based on this code.  If you modify
+ * this code, you may extend this exception to your version of the
+ * library, but you are not obligated to do so.  If you do not wish
+ * to do so, delete this exception statement from your version.
+ */
+
+package com.redhat.thermostat.common.config;
+
+public class InvalidConfigurationException extends Exception {
+
+    public InvalidConfigurationException() {
+        super();
+    }
+    
+    public InvalidConfigurationException(String message) {
+        super(message);
+    }
+    
+    public InvalidConfigurationException(String message, Throwable cause) {
+        super(message, cause);
+    }
+    
+    public InvalidConfigurationException(Throwable cause) {
+        super(cause);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/src/test/java/com/redhat/thermostat/common/TestUtils.java	Thu Mar 29 16:52:29 2012 +0200
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2012 Red Hat, Inc.
+ *
+ * This file is part of Thermostat.
+ *
+ * Thermostat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * Thermostat 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Thermostat; see the file COPYING.  If not see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Linking this code with other modules is making a combined work
+ * based on this code.  Thus, the terms and conditions of the GNU
+ * General Public License cover the whole combination.
+ *
+ * As a special exception, the copyright holders of this code give
+ * you permission to link this code with independent modules to
+ * produce an executable, regardless of the license terms of these
+ * independent modules, and to copy and distribute the resulting
+ * executable under terms of your choice, provided that you also
+ * meet, for each linked independent module, the terms and conditions
+ * of the license of that module.  An independent module is a module
+ * which is not derived from or based on this code.  If you modify
+ * this code, you may extend this exception to your version of the
+ * library, but you are not obligated to do so.  If you do not wish
+ * to do so, delete this exception statement from your version.
+ */
+
+package com.redhat.thermostat.common;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.lang.management.ManagementFactory;
+import java.util.Properties;
+import java.util.Random;
+
+public class TestUtils {
+
+    public static int getProcessId() {
+        String name = ManagementFactory.getRuntimeMXBean().getName();
+        String pidPart = name.split("@")[0];
+        return Integer.parseInt(pidPart);
+    }
+
+    public static boolean isLinux() {
+        return (System.getProperty("os.name").toLowerCase().contains("linux"));
+    }
+        
+    public static String setupAgentConfigs() throws IOException {
+        // need to create dummy config files for the tests
+        Random random = new Random();
+
+        String tmpDir = System.getProperty("java.io.tmpdir") + File.separatorChar +
+                Math.abs(random.nextInt()) + File.separatorChar;
+
+        System.setProperty("THERMOSTAT_HOME", tmpDir);
+        File agent = new File(tmpDir, "agent");
+        agent.mkdirs();
+
+        File tmpConfigs = new File(agent, "agent.properties");
+
+        new File(agent, "run").mkdirs();
+        new File(agent, "logs").mkdirs();
+
+        File backends = new File(tmpDir, "backends");
+        File system = new File(backends, "system");
+        system.mkdirs();
+        
+        Properties props = new Properties();            
+
+        props.setProperty("BACKENDS", "system");
+        props.setProperty("LOG_LEVEL", "WARNING");
+
+        props.store(new FileOutputStream(tmpConfigs), "thermostat agent test properties");
+
+        // now write the configs for the backends
+        tmpConfigs = new File(system, "backend.properties");
+        props = new Properties();
+        props.setProperty("BACKEND_CLASS",
+                          "com.redhat.thermostat.backend.system.SystemBackend");
+        props.setProperty("DESCRIPTION",
+                          "fluff backend for tests");
+        props.setProperty("VENDOR",
+                          "Red Hat, Inc.");
+        props.setProperty("VERSION",
+                          "1.0");
+        props.store(new FileOutputStream(tmpConfigs), "thermostat system backend properties");
+        
+        return tmpDir;
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/src/test/java/com/redhat/thermostat/common/config/ConfigUtilsTest.java	Thu Mar 29 16:52:29 2012 +0200
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2012 Red Hat, Inc.
+ *
+ * This file is part of Thermostat.
+ *
+ * Thermostat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * Thermostat 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Thermostat; see the file COPYING.  If not see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Linking this code with other modules is making a combined work
+ * based on this code.  Thus, the terms and conditions of the GNU
+ * General Public License cover the whole combination.
+ *
+ * As a special exception, the copyright holders of this code give
+ * you permission to link this code with independent modules to
+ * produce an executable, regardless of the license terms of these
+ * independent modules, and to copy and distribute the resulting
+ * executable under terms of your choice, provided that you also
+ * meet, for each linked independent module, the terms and conditions
+ * of the license of that module.  An independent module is a module
+ * which is not derived from or based on this code.  If you modify
+ * this code, you may extend this exception to your version of the
+ * library, but you are not obligated to do so.  If you do not wish
+ * to do so, delete this exception statement from your version.
+ */
+
+package com.redhat.thermostat.common.config;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Random;
+
+import junit.framework.Assert;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.redhat.thermostat.common.TestUtils;
+
+public class ConfigUtilsTest {
+
+    private String oldLocation;
+    
+    @Before
+    public void setUp() throws IOException {
+        TestUtils.setupAgentConfigs();
+    }
+    
+    @Test
+    public void testLocations() throws InvalidConfigurationException, IOException {
+        String path = System.getProperty("THERMOSTAT_HOME");
+        char s = File.separatorChar;
+        
+        Assert.assertEquals(path, ConfigUtils.getThermostatHome());
+        
+        Assert.assertEquals(path + "backends", ConfigUtils.getBackendsBaseDirectory().getCanonicalPath());
+        Assert.assertEquals(path + "storage", ConfigUtils.getStorageBaseDirectory().getCanonicalPath());
+        Assert.assertEquals(path + "storage" + s + "db.properties",
+                            ConfigUtils.getStorageConfigurationFile().getCanonicalPath());
+        Assert.assertEquals(path + "storage" + s + "db",
+                ConfigUtils.getStorageDirectory().getCanonicalPath());
+        Assert.assertEquals(path + "storage" + s + "logs" + s + "db.log",
+                ConfigUtils.getStorageLogFile().getCanonicalPath());
+        Assert.assertEquals(path + "storage" + s + "run" + s + "db.pid",
+                ConfigUtils.getStoragePidFile().getCanonicalPath());
+        
+        Assert.assertEquals(path + "backends" + s + "system" + s + "backend.properties",
+                            ConfigUtils.getBackendPropertyFile("system").getCanonicalPath());
+        
+    }
+}