com.rightscale.provider.rest.ServerTemplateExecutablesResource.java Source code

Introduction

Here is the source code for com.rightscale.provider.rest.ServerTemplateExecutablesResource.java

Source

// Dashboard: an Android front-end to the RightScale dashboard
// Copyright (C) 2009 Tony Spataro <code@tracker.xeger.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package com.rightscale.provider.rest;

import net.xeger.rest.ProtocolError;
import net.xeger.rest.RestException;
import net.xeger.rest.Session;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.rightscale.provider.*;

import android.database.Cursor;
import android.database.MatrixCursor;

public class ServerTemplateExecutablesResource extends DashboardResource {
    public static final String MIME_TYPE = "vnd.rightscale.server_template_executable";

    public static final String ID = Dashboard.ID;
    public static final String SERVER_TEMPLATE_ID = "server_template_id";
    public static final String APPLY = "apply";
    public static final String POSITION = "position";
    public static final String NAME = "name";
    public static final String RIGHT_SCRIPT_ID = "right_script_id";

    public static final String[] COLUMNS = { ID, SERVER_TEMPLATE_ID, APPLY, POSITION, NAME, RIGHT_SCRIPT_ID };

    public ServerTemplateExecutablesResource(Session session, String accountId) {
        super(session, accountId);
    }

    public Cursor indexForServerTemplate(String serverTemplateId, String apply) throws RestException {
        try {
            return buildCursor(serverTemplateId,
                    getJsonArray("server_templates/" + serverTemplateId + "/executables.js", "phase=" + apply));
        } catch (JSONException e) {
            throw new ProtocolError(e);
        }
    }

    //   public static final String[] COLUMNS = { ID, APPLY, POSITION, NAME, RIGHT_SCRIPT_ID };
    private void buildRow(int serverTemplateId, MatrixCursor.RowBuilder row, JSONObject object)
            throws JSONException, ProtocolError {
        String apply = object.getString("apply");
        int position = object.getInt("position");

        int applyOffset;
        if (apply.equals("boot")) {
            applyOffset = 0;
        } else if (apply.equals("operational")) {
            applyOffset = 250;
        } else if (apply.equals("decommission")) {
            applyOffset = 500;
        } else {
            throw new ProtocolError("Unexpected attribute value for server_template_executable: apply=" + apply);
        }

        //Synthesize a globally unique ID for this executable by composing its ST ID, apply phase, and position 
        int id = serverTemplateId * 1000 + applyOffset + position;

        row.add(id);
        row.add(serverTemplateId);
        row.add(apply);
        row.add(position);

        if (object.has("right_script")) {
            JSONObject right_script = object.getJSONObject("right_script");
            String name = right_script.getString("name");
            String href = right_script.getString("href");
            int rightScriptId = Integer.valueOf(href.substring(href.lastIndexOf('/') + 1)).intValue(); //TODO error handling
            row.add(name);
            row.add(rightScriptId);
        } else if (object.has("recipe")) {
            String name = object.getString("recipe");
            row.add(name);
        } else {
            throw new ProtocolError("server_template_executable has neither right_script nor recipe sub-element");
        }
    }

    private Cursor buildCursor(String serverTemplateId, JSONArray array) throws JSONException, ProtocolError {
        int nServerTemplateId = Integer.parseInt(serverTemplateId);

        MatrixCursor result = new MatrixCursor(COLUMNS);
        for (int i = 0; i < array.length(); i++) {
            JSONObject object = array.getJSONObject(i);
            MatrixCursor.RowBuilder row = result.newRow();
            buildRow(nServerTemplateId, row, object);
        }

        return result;
    }
}