root / src / Client.java
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import java.rmi.registry.LocateRegistry; |
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import java.rmi.registry.Registry; |
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public class Client { |
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public static void main(String[] args) { |
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// Command parameters
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String[] opnd = { "operand", "opnd1", "opnd2" }; |
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// Process Arguments
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// 2 arguments can only be STATE check
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if (args.length == 2) { |
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opnd[0] = "STATE"; |
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} |
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// 3 arguments can only be RECLAIM/DELETE/RESTORE
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else if (args.length == 3) { |
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switch (args[1]) { |
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case "RESTORE": |
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opnd[0] = "RESTORE"; |
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// File
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opnd[1] = args[2]; |
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break;
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case "DELETE": |
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opnd[0] = "DELETE"; |
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// File
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opnd[1] = args[2]; |
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break;
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case "RECLAIM": |
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opnd[0] = "RECLAIM"; |
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// Reclaim size
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opnd[1] = args[2]; |
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break;
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default:
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System.out.println("Error: Invalid operation name"); |
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return;
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} |
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} |
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// 4 arguments can only be BACKUP
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else if (args.length == 4) { |
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opnd[0] = "BACKUP"; |
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// File
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opnd[1] = args[2]; |
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// Replication level
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opnd[2] = args[3]; |
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} |
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// Any more arguments are invalid too
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else {
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System.out.println("java Client <peer_ap> <protocol> <opnd_1> <opnd_2"); |
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return;
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} |
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// Host id
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String[] host = new String(args[0]).split("/"); |
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try {
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PeerInterface stub; |
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// Lookup for RMI
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if(host.length > 2){ |
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Registry registry = LocateRegistry.getRegistry(host[2]); |
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stub = (PeerInterface) registry.lookup(host[3]);
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}else{
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Registry registry = LocateRegistry.getRegistry(); |
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stub = (PeerInterface) registry.lookup(args[0]);
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} |
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// Identify action
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switch (opnd[0]) { |
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case "BACKUP": |
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stub.backup(opnd[1], Integer.parseInt(opnd[2])); |
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break;
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case "RESTORE": |
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stub.restore(opnd[1]);
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break;
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case "DELETE": |
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stub.delete(opnd[1]);
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break;
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case "RECLAIM": |
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stub.reclaim(Integer.parseInt(opnd[1])); |
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break;
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default:
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break;
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} |
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} catch (Exception e) { |
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System.err.println("Client exception: " + e.toString()); |
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e.printStackTrace(); |
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} |
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} |
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} |