diff options
Diffstat (limited to 'client/src/main/java/com/att/cadi/locator/PropertyLocator.java')
| -rw-r--r-- | client/src/main/java/com/att/cadi/locator/PropertyLocator.java | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/client/src/main/java/com/att/cadi/locator/PropertyLocator.java b/client/src/main/java/com/att/cadi/locator/PropertyLocator.java new file mode 100644 index 0000000..011e42c --- /dev/null +++ b/client/src/main/java/com/att/cadi/locator/PropertyLocator.java @@ -0,0 +1,282 @@ +/*******************************************************************************
+ * ============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.locator;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.List;
+import java.security.SecureRandom;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import com.att.cadi.Locator;
+import com.att.cadi.LocatorException;
+import com.att.inno.env.util.Split;
+
+public class PropertyLocator implements Locator<URI> {
+ private final URI [] orig;
+ private PLItem[] current;
+ private int end;
+ private final SecureRandom random;
+ private URI[] resolved;
+ private long lastRefreshed=0L;
+ private long minRefresh;
+ private long backgroundRefresh;
+
+ public PropertyLocator(String locList) throws LocatorException {
+ this(locList,10000L, 1000*60*20); // defaults, do not refresh more than once in 10 seconds, Refresh Locator every 20 mins.
+ }
+ /**
+ * comma delimited root url list
+ *
+ * @param locList
+ * @throws LocatorException
+ */
+ public PropertyLocator(String locList, long minRefreshMillis, long backgroundRefreshMillis) throws LocatorException {
+ minRefresh = minRefreshMillis;
+ backgroundRefresh = backgroundRefreshMillis;
+ if(locList==null) {
+ throw new LocatorException("No Location List given for PropertyLocator");
+ }
+ String[] locarray = Split.split(',',locList);
+ List<URI> uriList = new ArrayList<URI>();
+
+ random = new SecureRandom();
+
+ for(int i=0;i<locarray.length;++i) {
+ try {
+ int range = locarray[i].indexOf(":[");
+ if(range<0) {
+ uriList.add(new URI(locarray[i]));
+ } else {
+ int dash = locarray[i].indexOf('-',range+2);
+ int brac = locarray[i].indexOf(']',dash+1);
+ int start = Integer.parseInt(locarray[i].substring(range+2, dash));
+ int end = Integer.parseInt(locarray[i].substring(dash+1, brac));
+ for(int port=start;port<=end;++port) {
+ uriList.add(new URI(locarray[i].substring(0, range+1)+port));
+ }
+ }
+ } catch (NumberFormatException nf) {
+ throw new LocatorException("Invalid URI format: " + locarray[i]);
+ } catch (URISyntaxException e) {
+ throw new LocatorException(e);
+ }
+ }
+ orig = new URI[uriList.size()];
+ uriList.toArray(orig);
+
+ refresh();
+ new Timer("PropertyLocator Refresh Timer",true).scheduleAtFixedRate(new TimerTask() {
+ @Override
+ public void run() {
+ refresh();
+ }
+ }, backgroundRefresh,backgroundRefresh);
+
+ }
+
+ @Override
+ public URI get(Item item) throws LocatorException {
+ synchronized(orig) {
+ if(item==null) {
+ return null;
+ } else {
+ return resolved[((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 {
+ if(item==null) {
+ return null;
+ } else {
+ 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) {
+ refresh();
+ 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 {
+ if(current.length==0) {
+ refresh();
+ }
+ switch(current.length) {
+ case 0:
+ return null;
+ case 1:
+ return current[0];
+ default:
+ return current[Math.abs(random.nextInt())%current.length];
+ }
+ }
+
+ @Override
+ public synchronized boolean refresh() {
+ if(System.currentTimeMillis()>lastRefreshed) {
+ // Build up list
+ List<URI> resolve = new ArrayList<URI>();
+ String realname;
+ for(int i = 0; i < orig.length ; ++i) {
+ try {
+ InetAddress ia[] = InetAddress.getAllByName(orig[i].getHost());
+
+ URI o,n;
+ for(int j=0;j<ia.length;++j) {
+ o = orig[i];
+ Socket socket = new Socket();
+ try {
+ realname=ia[j].getCanonicalHostName();
+ socket.connect(new InetSocketAddress(realname,o.getPort()),3000);
+ if(socket.isConnected()) {
+ n = new URI(
+ o.getScheme(),
+ o.getUserInfo(),
+ realname,
+ o.getPort(),
+ o.getPath(),
+ o.getQuery(),
+ o.getFragment()
+ );
+ resolve.add(n);
+ }
+ } catch (IOException e) {
+ } finally {
+ if(!socket.isClosed()) {
+ try {
+ socket.close();
+ } catch (IOException e) {
+ // nothing to do.
+ }
+ }
+ }
+ }
+ } catch (UnknownHostException | URISyntaxException e) {
+ // Note: Orig Name already known as valid, based on constructor
+ }
+ }
+ end=resolve.size();
+ PLItem[] newCurrent;
+ if(current==null || current.length!=end) {
+ newCurrent = new PLItem[end];
+ } else {
+ newCurrent = current;
+ }
+
+ for(int i=0; i< end; ++i) {
+ if(newCurrent[i]==null){
+ newCurrent[i]=new PLItem(i);
+ } else {
+ newCurrent[i].idx=newCurrent[i].order=i;
+ }
+ }
+ synchronized(orig) {
+ resolved = new URI[end];
+ resolve.toArray(resolved);
+ current = newCurrent;
+ }
+ lastRefreshed = System.currentTimeMillis()+minRefresh;
+ return !resolve.isEmpty();
+ } else {
+ return false;
+ }
+ }
+
+ private class PLItem implements Item {
+ public int idx,order;
+
+ public PLItem(int i) {
+ idx = order =i;
+ }
+
+ public String toString() {
+ return "Item: " + idx + " order: " + order;
+ }
+ }
+
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ boolean first = true;
+ for(URI uri : orig) {
+ boolean isResolved=false;
+ if(uri!=null) {
+ if(first) {
+ first = false;
+ } else {
+ sb.append(", ");
+ }
+ sb.append(uri.toString());
+ sb.append(" [");
+ for(URI u2 : resolved) {
+ if(uri.equals(u2)) {
+ isResolved = true;
+ break;
+ }
+ }
+ sb.append(isResolved?"X]\n":" ]");
+ }
+ }
+ return sb.toString();
+ }
+
+ public void destroy() {
+ }
+}
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