From 4a51a8f96715ffb2a42189b93b9fa91b453b8530 Mon Sep 17 00:00:00 2001
From: sg481n <sg481n@att.com>
Date: Thu, 3 Aug 2017 17:39:12 -0400
Subject:  [AAF-21] Initial code import
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Change-Id: Ia1dd196befd061f6ba0c2be6bf4456a30ea50f97
Signed-off-by: sg481n <sg481n@att.com>
---
 .../java/com/att/cadi/client/PropertyLocator.java  | 144 +++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 client/src/main/java/com/att/cadi/client/PropertyLocator.java

(limited to 'client/src/main/java/com/att/cadi/client/PropertyLocator.java')

diff --git a/client/src/main/java/com/att/cadi/client/PropertyLocator.java b/client/src/main/java/com/att/cadi/client/PropertyLocator.java
new file mode 100644
index 0000000..37bc7b6
--- /dev/null
+++ b/client/src/main/java/com/att/cadi/client/PropertyLocator.java
@@ -0,0 +1,144 @@
+/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aai
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * Copyright © 2017 Amdocs
+ * * ===========================================================================
+ * * 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.
+ * * ============LICENSE_END====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+package com.att.cadi.client;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Random;
+
+import com.att.cadi.Locator;
+import com.att.cadi.LocatorException;
+
+public class PropertyLocator implements Locator {
+	private final URI [] orig;
+	private PLItem[] current;
+	private int end;
+	private final Random random;
+	
+	/**
+	 * comma delimited root url list
+	 * 
+	 * @param locList
+	 * @throws LocatorException
+	 */
+	public PropertyLocator(String locList) throws LocatorException {
+		if(locList==null)throw new LocatorException("No Location List given for PropertyLocator");
+		String[] locarray = locList.split("\\s*,\\s*");
+		orig = new URI[locarray.length];
+		
+		random = new Random();
+		
+		for(int i=0;i<locarray.length;++i) {
+			try {
+				orig[i] = new URI(locarray[i]);
+			} catch (URISyntaxException e) {
+				throw new LocatorException(e);
+			}
+		}
+
+		current = new PLItem[orig.length];
+		refresh();
+	}
+
+	@Override
+	public URI get(Item item) throws LocatorException {
+		return orig[((PLItem)item).idx];
+	}
+
+	@Override
+	public Item first() throws LocatorException {
+		return end>0?current[0]:null;
+	}
+
+	@Override
+	public boolean hasItems() {
+		return end>0;
+	}
+
+	@Override
+	public Item next(Item item) throws LocatorException {
+		int spot;
+		if((spot=(((PLItem)item).order+1))>=end)return null;
+		return current[spot];
+	}
+
+	@Override
+	public synchronized void invalidate(Item item) throws LocatorException {
+		if(--end<=0)return;
+		PLItem pli = (PLItem)item;
+		int i,order;
+		for(i=0;i<end;++i) {
+			if(pli==current[i])break;
+		}
+		order = current[i].order;
+		for(;i<end;++i) {
+			current[i]=current[i+1];
+			current[i].order=order++;
+		}
+		current[end]=pli;
+	}
+
+	@Override
+	public Item best() throws LocatorException {
+		switch(current.length) {
+			case 0:
+				return null;
+			case 1:
+				return current[0];
+			default:
+				return current[Math.abs(random.nextInt())%end];
+		}
+	}
+
+	@Override
+	public synchronized boolean refresh() {
+		end = orig.length;
+		
+		// Build up list
+		for(int i = 0; i < end ; ++i) {
+			if(current[i]==null)current[i]=new PLItem(i);
+			else current[i].idx=current[i].order=i;
+		}
+		return true;
+	}
+	
+	private class PLItem implements Item {
+		public int idx,order;
+		
+		public PLItem(int i) {
+			idx = order =i;
+		}
+		
+		public String toString() {
+			return "Item: " + idx + " order: " + order;
+		}
+	}
+
+	@Override
+	public void destroy() {
+		// TODO Auto-generated method stub
+		
+	}
+
+}
-- 
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