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-rw-r--r--policy-utils/src/main/java/org/onap/policy/drools/utils/OrderedServiceImpl.java16
-rw-r--r--policy-utils/src/main/java/org/onap/policy/drools/utils/PropertyUtil.java43
-rw-r--r--policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java7
3 files changed, 35 insertions, 31 deletions
diff --git a/policy-utils/src/main/java/org/onap/policy/drools/utils/OrderedServiceImpl.java b/policy-utils/src/main/java/org/onap/policy/drools/utils/OrderedServiceImpl.java
index ee70a4b5..99c4566a 100644
--- a/policy-utils/src/main/java/org/onap/policy/drools/utils/OrderedServiceImpl.java
+++ b/policy-utils/src/main/java/org/onap/policy/drools/utils/OrderedServiceImpl.java
@@ -43,7 +43,12 @@ public class OrderedServiceImpl<T extends OrderedService>
private List<T> implementers = null;
// 'ServiceLoader' that is used to discover and create the services
- private ServiceLoader<T> serviceLoader = null; //ServiceLoader.load(T.class);
+ private ServiceLoader<T> serviceLoader = null;
+
+ // use this to ensure that we only use one unique instance of each class
+ @SuppressWarnings("rawtypes")
+ private static HashMap<Class,OrderedService> classToSingleton =
+ new HashMap<>();
/**
* Constructor - create the 'ServiceLoader' instance
@@ -114,7 +119,7 @@ public class OrderedServiceImpl<T extends OrderedService>
rval = o1.getClass().getName().compareTo
(o2.getClass().getName());
}
- return(rval);
+ return rval;
}
});
@@ -124,11 +129,6 @@ public class OrderedServiceImpl<T extends OrderedService>
return implementers;
}
- // use this to ensure that we only use one unique instance of each class
- @SuppressWarnings("rawtypes")
- static private HashMap<Class,OrderedService> classToSingleton =
- new HashMap<>();
-
/**
* If a service implements multiple APIs managed by 'ServiceLoader', a
* separate instance is created for each API. This method ensures that
@@ -140,7 +140,7 @@ public class OrderedServiceImpl<T extends OrderedService>
* the object of this class that was initially created is returned
* instead.
*/
- static private synchronized OrderedService
+ private static synchronized OrderedService
getSingleton(OrderedService service)
{
// see if we already have an instance of this class
diff --git a/policy-utils/src/main/java/org/onap/policy/drools/utils/PropertyUtil.java b/policy-utils/src/main/java/org/onap/policy/drools/utils/PropertyUtil.java
index d69ea339..4e00a6db 100644
--- a/policy-utils/src/main/java/org/onap/policy/drools/utils/PropertyUtil.java
+++ b/policy-utils/src/main/java/org/onap/policy/drools/utils/PropertyUtil.java
@@ -31,12 +31,25 @@ import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
/**
* This class provides utilities to read properties from a properties
* file, and optionally get notifications of future changes
*/
public class PropertyUtil
{
+
+ // timer thread used for polling for property file changes
+ private static Timer timer = null;
+
+ // this table maps canonical file into a 'ListenerRegistration' instance
+ private static HashMap<File, ListenerRegistration> registrations =
+ new HashMap<>();
+
+ private static final Logger logger = LoggerFactory.getLogger(PropertyUtil.class.getName());
+
/**
* Read in a properties file
* @param file the properties file
@@ -45,7 +58,7 @@ public class PropertyUtil
* does not exist or can't be opened, and 'IOException' if there is
* a problem loading the properties file.
*/
- static public Properties getProperties(File file) throws IOException
+ public static Properties getProperties(File file) throws IOException
{
// create an InputStream (may throw a FileNotFoundException)
FileInputStream fis = new FileInputStream(file);
@@ -73,16 +86,13 @@ public class PropertyUtil
* does not exist or can't be opened, and 'IOException' if there is
* a problem loading the properties file.
*/
- static public Properties getProperties(String fileName) throws IOException
+ public static Properties getProperties(String fileName) throws IOException
{
return getProperties(new File(fileName));
}
/* ============================================================ */
- // timer thread used for polling for property file changes
- private static Timer timer = null;
-
/**
* This is the callback interface, used for sending notifications of
* changes in the properties file.
@@ -99,10 +109,6 @@ public class PropertyUtil
void propertiesChanged(Properties properties, Set<String> changedKeys);
}
- // this table maps canonical file into a 'ListenerRegistration' instance
- static private HashMap<File, ListenerRegistration> registrations =
- new HashMap<>();
-
/**
* This is an internal class - one instance of this exists for each
* property file that is being monitored. Note that multiple listeners
@@ -170,7 +176,7 @@ public class PropertyUtil
}
catch (Exception e)
{
- System.err.println(e);
+ logger.warn("Polling for property changes", e);
}
}
};
@@ -303,29 +309,30 @@ public class PropertyUtil
* does not exist or can't be opened, and 'IOException' if there is
* a problem loading the properties file.
*/
- static public Properties getProperties(File file, Listener listener)
+ public static Properties getProperties(File file, Listener listener)
throws IOException
{
+ File propFile = file;
if (listener == null)
{
// no listener specified -- just fetch the properties
- return getProperties(file);
+ return getProperties(propFile);
}
// Convert the file to a canonical form in order to avoid the situation
// where different names refer to the same file.
- file = file.getCanonicalFile();
+ propFile = propFile.getCanonicalFile();
// See if there is an existing registration. The 'synchronized' block
// is needed to handle the case where a new listener is added at about
// the same time that another one is being removed.
synchronized(registrations)
{
- ListenerRegistration reg = registrations.get(file);
+ ListenerRegistration reg = registrations.get(propFile);
if (reg == null)
{
// a new registration is needed
- reg = new ListenerRegistration(file);
+ reg = new ListenerRegistration(propFile);
}
return reg.addListener(listener);
}
@@ -347,7 +354,7 @@ public class PropertyUtil
* does not exist or can't be opened, and 'IOException' if there is
* a problem loading the properties file.
*/
- static public Properties getProperties(String fileName, Listener listener)
+ public static Properties getProperties(String fileName, Listener listener)
throws IOException
{
return getProperties(new File(fileName), listener);
@@ -359,7 +366,7 @@ public class PropertyUtil
* @param notify if not null, this is a callback interface that was used for
* notifications of changes
*/
- static public void stopListening(File file, Listener listener)
+ public static void stopListening(File file, Listener listener)
{
if (listener != null)
{
@@ -377,7 +384,7 @@ public class PropertyUtil
* @param notify if not null, this is a callback interface that was used for
* notifications of changes
*/
- static public void stopListening(String fileName, Listener listener)
+ public static void stopListening(String fileName, Listener listener)
{
stopListening(new File(fileName), listener);
}
diff --git a/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java b/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java
index d300058f..50135e84 100644
--- a/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java
+++ b/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java
@@ -31,7 +31,7 @@ import org.slf4j.LoggerFactory;
*/
public class ReflectionUtil {
- protected final static Logger logger = LoggerFactory.getLogger(ReflectionUtil.class);
+ protected static final Logger logger = LoggerFactory.getLogger(ReflectionUtil.class);
private ReflectionUtil(){
}
@@ -55,10 +55,7 @@ public class ReflectionUtil {
classLoader + " must be provided");
try {
- Class<?> aClass = Class.forName(className,
- true,
- classLoader);
- return aClass;
+ return Class.forName(className, true, classLoader);
} catch (Exception e) {
logger.error("class {} fetched in {} does not exist", className, classLoader, e);
}