Synnefo » Pithos Android Client

package com.rackspacecloud.android;

import java.util.ArrayList;

import com.rackspace.cloud.loadbalancer.api.client.LoadBalancer;

import com.rackspace.cloud.loadbalancer.api.client.Node;

import com.rackspace.cloud.loadbalancer.api.client.NodeManager;

import com.rackspace.cloud.loadbalancer.api.client.http.LoadBalancersException;

import android.content.Intent;

import android.os.AsyncTask;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.widget.TextView;

public class EditNodesActivity extends CloudListActivity {

        private static final int EDIT_NODE_CODE = 299;

        private static final int NODE_DELETED_CODE = 389;

        //private static final int ADD_MORE_NODES_CODE = 165;

        private ArrayList<Node> nodes;

        private LoadBalancer loadBalancer;

        private int cellType;

        @SuppressWarnings("unchecked")

        @Override

        public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.editnodes);

                nodes = (ArrayList<Node>) this.getIntent().getExtras().get("nodes");

                loadBalancer = (LoadBalancer) this.getIntent().getExtras().get("loadBalancer");

                displayNodes();

                restoreState(savedInstanceState);

        }

        @Override

        protected void onSaveInstanceState(Bundle outState) {

                super.onSaveInstanceState(outState);

                outState.putSerializable("nodes", nodes);

        }

        @SuppressWarnings("unchecked")

        protected void restoreState(Bundle state) {

                super.restoreState(state);

                if (state != null && state.containsKey("nodes")){

                        nodes = (ArrayList<Node>) state.getSerializable("nodes");

                        displayNodes();

                }

                Button submitNodes = (Button) findViewById(R.id.submit_nodes_button);

                submitNodes.setOnClickListener(new OnClickListener() {

                        @Override

                        public void onClick(View v) {

                                Intent viewIntent = new Intent(getApplicationContext(), AddMoreNodesActivity.class);

                                viewIntent.putExtra("nodes", nodes);

                                viewIntent.putExtra("loadBalancer", loadBalancer);

                                startActivityForResult(viewIntent, EDIT_NODE_CODE);

                        }

                });

                if(loadBalancer.getAlgorithm().contains("WEIGHTED")){

                        cellType = R.layout.displayweightednodecell;

                }

                else{

                        cellType = R.layout.displaynodecell;

                }

        }

        private void displayNodes(){

                if (nodes.size() == 0) {

                        displayNoNodesCell();

                } else {

                        getListView().setDividerHeight(1); // restore divider lines

                        setListAdapter(new NodeAdapter());

                }

        }

        @Override

        public void onBackPressed(){

                setResult(RESULT_CANCELED);

                finish();

        }

        private void displayNoNodesCell() {

                String a[] = new String[1];

                a[0] = "No Nodes";

                setListAdapter(new ArrayAdapter<String>(this, R.layout.noserverscell, R.id.no_servers_label, a));

                getListView().setTextFilterEnabled(true);

                getListView().setDividerHeight(0); // hide the dividers so it won't look like a list row

                getListView().setItemsCanFocus(false);

        }

        protected void onListItemClick(ListView l, View v, int position, long id) {

                if (nodes != null && nodes.size() > 0) {

                        Intent viewIntent = new Intent(this, EditNodeActivity.class);

                        viewIntent.putExtra("node", nodes.get(position));

                        viewIntent.putExtra("loadBalancer", loadBalancer);

                        startActivityForResult(viewIntent, EDIT_NODE_CODE); // arbitrary number; never used again

                }

        }

        // * Adapter/

        class NodeAdapter extends ArrayAdapter<Node> {

                NodeAdapter() {

                        super(EditNodesActivity.this, cellType, nodes);

                }

                public View getView(int position, View convertView, ViewGroup parent) {

                        final Node node = nodes.get(position);

                        LayoutInflater inflater = getLayoutInflater();

                        View row = inflater.inflate(cellType, parent, false);

                        TextView ipLabel = (TextView) row.findViewById(R.id.ip_address_text);

                        ipLabel.setText(node.getAddress());

                        TextView conditionLabel = (TextView) row.findViewById(R.id.condition_text);

                        conditionLabel.setText(node.getCondition());

                        TextView portLabel = (TextView) row.findViewById(R.id.port_text);

                        portLabel.setText(node.getPort());

                        if(cellType == R.layout.displayweightednodecell){

                                TextView weightLabel = (TextView) row.findViewById(R.id.weight_text);

                                weightLabel.setText(node.getWeight());

                        }

                        return(row);

                }

        }

        // tasks

        private class LoadNodesTask extends AsyncTask<Void, Void, ArrayList<Node>> {

                private LoadBalancersException exception;

                protected void onPreExecute() {

                        /*

                         * set to null, so if config change occurs

                         * it will be reloaded in onCreate()

                         */

                        showDialog();

                }

                @Override

                protected ArrayList<Node> doInBackground(Void... arg0) {

                        ArrayList<Node> result = null;

                        try {

                                result = (new NodeManager(getContext())).createList(loadBalancer);

                        } catch (LoadBalancersException e) {

                                exception = e;

                        }

                        return result;

                }

                @Override

                protected void onPostExecute(ArrayList<Node> result) {

                        hideDialog();

                        if (exception != null) {

                                showAlert("Error", exception.getMessage());

                        }

                        nodes = new ArrayList<Node>();

                        for(Node n : result){

                                nodes.add(n);

                        }

                        displayNodes();

                }

        } 

        /*

         * if the node has the same ip as

         * a node in the list remove it

         */

        private void removeFromList(Node node){

                for(int i = 0; i < nodes.size(); i++){

                        if(nodes.get(i).getAddress().equals(node.getAddress())){

                                nodes.remove(i);

                        }

                }

                displayNodes();

        }

        protected void onActivityResult(int requestCode, int resultCode, Intent data){

                //Node(s) was added so refresh the node list

                if(requestCode == EDIT_NODE_CODE && resultCode == RESULT_OK){

                        new LoadNodesTask().execute();

                }

                //Node was removed so take it off the list

                if(requestCode == EDIT_NODE_CODE && resultCode == NODE_DELETED_CODE){

                        Node node = (Node)data.getSerializableExtra("deletedNode");

                        removeFromList(node);

                }

        }

}