From 254ee6f47eebfc00462c10756a92066e82cc1a96 Mon Sep 17 00:00:00 2001
From: Andrew Branson <andrew@andrewbranson.net>
Date: Tue, 21 Jun 2011 15:46:02 +0200
Subject: Initial commit

---
 source/com/c2kernel/persistency/ProxyLoader.java | 124 +++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100755 source/com/c2kernel/persistency/ProxyLoader.java

(limited to 'source/com/c2kernel/persistency/ProxyLoader.java')

diff --git a/source/com/c2kernel/persistency/ProxyLoader.java b/source/com/c2kernel/persistency/ProxyLoader.java
new file mode 100755
index 0000000..d20fb2d
--- /dev/null
+++ b/source/com/c2kernel/persistency/ProxyLoader.java
@@ -0,0 +1,124 @@
+package com.c2kernel.persistency;
+import java.util.HashMap;
+import java.util.StringTokenizer;
+
+import com.c2kernel.entity.AgentHelper;
+import com.c2kernel.entity.C2KLocalObject;
+import com.c2kernel.entity.ItemHelper;
+import com.c2kernel.entity.ManageableEntity;
+import com.c2kernel.lookup.EntityPath;
+import com.c2kernel.lookup.LDAPLookup;
+import com.c2kernel.persistency.outcome.Outcome;
+import com.c2kernel.process.Gateway;
+import com.c2kernel.utils.CastorXMLUtility;
+import com.c2kernel.utils.Logger;
+
+/** Used by proxies to load clusters by queryData from the Entity.
+*   Last client storage - only used if not cached elsewhere
+*/
+
+public class ProxyLoader extends ClusterStorage {
+    HashMap entities = new HashMap();
+    LDAPLookup lookup;
+
+    public void open() throws ClusterStorageException {
+        lookup = Gateway.getLDAPLookup();
+    }
+
+    public void close() throws ClusterStorageException {
+    }
+    // introspection
+    public short queryClusterSupport(String clusterType) {
+        return READ;
+    }
+
+    public String getName() {
+        return "Proxy Cluster Loader";
+    }
+    
+    public String getId() {
+        return "CORBA";
+    }
+
+    // retrieve object by path
+    public C2KLocalObject get(Integer sysKey, String path) throws ClusterStorageException {
+        try {
+            ManageableEntity thisEntity = getIOR(sysKey);
+            String type = getClusterType(path);
+
+            // fetch the xml from the item
+            String queryData = thisEntity.queryData(path);
+            
+            if (queryData != null) {
+                if (type.equals(OUTCOME)) 
+                    return new Outcome(path, queryData);
+                else                	
+                    return (C2KLocalObject)CastorXMLUtility.unmarshall(queryData);
+            }
+        } catch (Exception e) {
+            //Logger.error(e);
+            throw new ClusterStorageException(e.getMessage());
+        }
+        return null;
+    }
+    
+    // store object by path
+    public void put(Integer sysKey, C2KLocalObject obj) throws ClusterStorageException {
+        // not supported
+        throw new ClusterStorageException("Cannot write to items through the ProxyLoader");
+    }
+    // delete cluster
+    public void delete(Integer sysKey, String path) throws ClusterStorageException {
+        // not supported
+        throw new ClusterStorageException("Cannot write to items through the ProxyLoader");
+    }
+
+    /* navigation */
+
+    // directory listing
+    public String[] getClusterContents(Integer sysKey, String path) throws ClusterStorageException {
+        try {
+            ManageableEntity thisEntity = getIOR(sysKey);
+            String contents = thisEntity.queryData(path+"/all");
+            StringTokenizer tok = new StringTokenizer(contents, ",");
+            String[] result = new String[tok.countTokens()];
+            for (int i=0; i<result.length; i++) 
+                result[i] = tok.nextToken();
+                
+            return result;
+        } catch (Exception e) {
+            throw new ClusterStorageException(e.getMessage());
+        }
+    }
+    
+    private ManageableEntity getIOR(Integer sysKey) throws ClusterStorageException {
+        if (entities.containsKey(sysKey)) {
+            // check the cache
+            Logger.msg(7, "ProxyLoader.getIOR() - "+sysKey+" cached.");
+            return (ManageableEntity)entities.get(sysKey);
+        }
+        
+        try {
+            Logger.msg(7, "ProxyLoader.getIOR() - Resolving "+sysKey+".");
+        
+            org.omg.CORBA.Object ior = lookup.getIOR(new EntityPath(sysKey.intValue()));
+        
+            ManageableEntity thisEntity = null;
+            try {
+                thisEntity = ItemHelper.narrow(ior);
+            } catch (org.omg.CORBA.BAD_PARAM ex) {
+                try {
+                    thisEntity =  AgentHelper.narrow(ior);
+                } catch (org.omg.CORBA.BAD_PARAM ex2) {
+                    throw new ClusterStorageException ("Could not narrow "+sysKey+" as a known Entity type");
+                }
+            }
+            
+            Logger.msg(7, "ProxyLoader.getIOR() - Found "+sysKey+".");
+            entities.put(sysKey, thisEntity);
+            return thisEntity;
+        } catch (Exception e) {
+            throw new ClusterStorageException("Error narrowing "+sysKey+": "+e.getMessage());
+        }
+    }
+}       
-- 
cgit v1.2.3