/**
* Loads an schedule item from a datasource
*
* @param dataSource the datasource object where to look up the schedule item
* @param rowKey the rowkey of the schedule item to retrieve
* @return
*/
public static ScheduleItem load(DataSource dataSource, Schedule schedule, String rowKey) {
Table table = dataSource.getTable(ScheduleItem.tableName);
Get get = ScheduleItem.fillGetObject(table.createGetObject(rowKey));
Result result = table.get(get);
ScheduleItem r = ScheduleItem.fromResultObject(schedule, result);
return r;
}
/**
* time stamps this schedule item in the underlying storage by udpating the content of the column
* 'bigs:alive' with the current date only if the existing uuid is the same of this process.
*
* @param dataSource the datasource object where this schedule item is stored
* @return true if the update was successful, false otherwise (if the existing uuid is different,
* meaning that somebody else is working on this schedule item)
*/
public Boolean markAlive(DataSource dataSource) {
Table table = dataSource.getTable(ScheduleItem.tableName);
Put put = table.createPutObject(this.getRowkey());
this.lastUpdate = new Date(Core.getTime());
put = this.fillPutObject(put);
put = Data.fillInHostMetadata(put);
Boolean r = table.checkAndPut(this.getRowkey(), "bigs", "uuid", Core.myUUID.getBytes(), put);
return r;
}
@Override
public void run(String[] args) throws Exception {
String tableName = args[0];
File destinationDir = new File(".");
if (args.length == 2) destinationDir = new File(args[1]);
DataSource dataSource = BIGS.globalProperties.getPreparedDataSource();
Table table = dataSource.getTable(tableName);
ResultScanner scanner = table.getScan(table.createScanObject());
Result r = null;
while ((r = scanner.next()) != null) {
File destFile = new File(destinationDir, r.getRowKey());
Log.info("downloading to file " + destFile.getName());
DataItem dataItem = DataItem.fromResult(r);
FileOutputStream fstream = new FileOutputStream(destFile);
fstream.write(dataItem.asFileContent());
fstream.close();
}
}
/**
* saves this schedule item in the underlying datasource
*
* @param dataSource the datasource
*/
public void save() {
DataSource dataSource = BIGS.globalProperties.getPreparedDataSource();
Table table = dataSource.getTable(ScheduleItem.tableName);
table.put(Data.fillInHostMetadata(this.fillPutObject(table.createPutObject(this.getRowkey()))));
}