Synnefo » Pithos Android Client

package com.rackspacecloud.android;

import java.util.ArrayList;

import java.util.Arrays;

import android.content.Intent;

import android.graphics.Color;

import android.os.AsyncTask;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.TextView;

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

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

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

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

public class SharedVipActivity extends CloudListActivity {

        private LoadBalancer[] loadBalancers;

        private VirtualIp[] vips;

        private String loadBalancerPort;

        private String loadBalancerRegion;

        private VirtualIp selectedVip;

        @Override

        public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.list_vips);

                loadBalancerPort = (String) this.getIntent().getExtras().get("loadBalancerPort");

                loadBalancerRegion = (String) this.getIntent().getExtras().get("loadBalancerRegion");

                selectedVip = (VirtualIp) this.getIntent().getExtras().get("selectedVip");

                restoreState(savedInstanceState);

        }

        @Override

        protected void onSaveInstanceState(Bundle outState) {

                super.onSaveInstanceState(outState);

                outState.putSerializable("loadBalancers", loadBalancers);

        }

        protected void restoreState(Bundle state) {

                super.restoreState(state);

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

                        loadBalancers = (LoadBalancer[]) state.getSerializable("loadBalancers");

                        if (loadBalancers.length == 0) {

                                displayNoLoadBalancerCell();

                        } else {

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

                                setListAdapter(new VirtualIpAdapter());

                        }

                } else {

                        loadLoadBalancers();

                }

        }

        private void displayNoLoadBalancerCell() {

                String a[] = new String[1];

                a[0] = "No Load Balancers";

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

                getListView().setTextFilterEnabled(true);

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

                getListView().setItemsCanFocus(false);

        }

        private void setLoadBalancersList(ArrayList<VirtualIp> vips) {

                if (vips == null) {

                        vips = new ArrayList<VirtualIp>();

                }

                this.vips = new VirtualIp[vips.size()];

                if (vips != null) {

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

                                VirtualIp virtualIp = vips.get(i);

                                this.vips[i] = virtualIp;

                        }

                }

                if (this.vips.length == 0) {

                        displayNoLoadBalancerCell();

                } else {

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

                        setListAdapter(new VirtualIpAdapter());

                }

        }

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

                /*

                 * only allow clicks on vips that do not have the same port

                 * as the lb and are in same region

                 */

                if (vips != null && vips.length > 0) {

                        if(vips[position].getLoadBalancer().getPort().equals(loadBalancerPort)){

                                showToast("Cannot use this Virtual IP. The same port cannot be used on multiple load balancers for a Shared Virtual IP.");

                        } else if(!vips[position].getLoadBalancer().getRegion().equals(loadBalancerRegion)){

                                showToast("Cannot use this Virtual IP. The Shared Virtual IP must come the same region as the new load balancer.");

                        } else {

                                Intent viewIntent = new Intent();

                                selectedVip = vips[position];

                                viewIntent.putExtra("selectedVip", vips[position]);

                                setResult(RESULT_OK, viewIntent);

                                //the redisplay will color the users selection white

                                setLoadBalancersList(new ArrayList<VirtualIp>(Arrays.asList(vips)));

                        }

                }

        }

        // * Adapter/

        class VirtualIpAdapter extends ArrayAdapter<VirtualIp> {

                VirtualIpAdapter() {

                        super(SharedVipActivity.this,

                                        R.layout.sharedvipcell, vips);

                }

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

                        VirtualIp virtualIp = vips[position];

                        LayoutInflater inflater = getLayoutInflater();

                        View row = inflater.inflate(R.layout.sharedvipcell,

                                        parent, false);

                        TextView vipAddress = (TextView) row.findViewById(R.id.vip_address);

                        vipAddress.setText(virtualIp.getAddress());

                        TextView type = (TextView) row.findViewById(R.id.vip_type);

                        type.setText(virtualIp.getType());

                        TextView name = (TextView) row.findViewById(R.id.load_balancer_name);

                        name.setText(virtualIp.getLoadBalancer().getName());

                        TextView protocol = (TextView) row.findViewById(R.id.vip_protocol);

                        protocol.setText(virtualIp.getLoadBalancer().getProtocol() 

                                        + "(" + virtualIp.getLoadBalancer().getPort() + ")");

                        //Set the text of the selected vip (if there is one)

                        //to white so the user knows what they picked

                        boolean isSelected = selectedVip != null && selectedVip.getAddress().equals(vips[position].getAddress());

                        if(isSelected){

                                vipAddress.setTextColor(Color.WHITE);

                                type.setTextColor(Color.WHITE);

                                name.setTextColor(Color.WHITE);

                                protocol.setTextColor(Color.WHITE);

                                protocol.setTextColor(Color.WHITE);

                        }

                        return (row);

                }

        }

        private void loadLoadBalancers() {

                new LoadLoadBalancersTask().execute((Void[]) null);

        }

        private class LoadLoadBalancersTask extends AsyncTask<Void, Void, ArrayList<LoadBalancer>> {

                private LoadBalancersException exception;

                @Override

                protected void onPreExecute(){

                        showDialog();

                }

                @Override

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

                        ArrayList<LoadBalancer> loadBalancers = null;

                        try {

                                loadBalancers = (new LoadBalancerManager(context)).createList();

                        } catch (LoadBalancersException e) {

                                exception = e;

                        }

                        return loadBalancers;

                }

                @Override

                protected void onPostExecute(ArrayList<LoadBalancer> result) {

                        hideDialog();

                        if (exception != null) {

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

                        }

                        ArrayList<VirtualIp> vipList = getVipList(result);

                        setLoadBalancersList(vipList);

                }

        }

        private ArrayList<VirtualIp> getVipList(ArrayList<LoadBalancer> result){

                ArrayList<VirtualIp> vips = new ArrayList<VirtualIp>();

                for(LoadBalancer lb : result){

                        for(VirtualIp ip : lb.getVirtualIps()){

                                ip.setLoadBalancer(lb);

                                vips.add(ip);

                        }

                }

                return vips;

        }

}