Java Item.getString方法代码示例

import com.amazonaws.services.dynamodbv2.document.Item; //导入方法依赖的package包/类
@Override
public void transform(Item scoreItem, DynamoDB dynamodb) {
    String playerName = scoreItem.getString(PLAYER_NAME);
    int score = scoreItem.getInt(SCORE);
    int gameLength = scoreItem.getInt(GAME_LENGTH);
    
    /*
     * The XSpec API allows you to use DynamoDB's expression language
     * to execute expressions on the service-side.
     *  
     * https://java.awsblog.com/post/TxBG87QOQZRZJF/-DynamoDB-XSpec-API  
     */
    Table viewTable = dynamodb.getTable(PLAYER_STATS_TABLE_NAME);
    UpdateItemExpressionSpec incrementTotalOrder = new ExpressionSpecBuilder()
            .addUpdate(N(TOTAL_SCORE).add(score))
            .addUpdate(N(TOTAL_GAMEPLAY).add(gameLength))
            .addUpdate(N(TOTAL_GAMES).add(1))
            .buildForUpdate();
    viewTable.updateItem(PLAYER_NAME, playerName, incrementTotalOrder);
}
 

import com.amazonaws.services.dynamodbv2.document.Item; //导入方法依赖的package包/类
public String readOwningType(final String identity)
{
    final Table table = dynamoDBConnection.getDynamoDB().getTable(getTableName());
    final Item item = table.getItem("_id", generateItemId(identity));

    if (item != null)
    {
        return item.getString(DynamoDBUtils.FIELD_NAME_OWNING_ACTOR_TYPE);
    }
    return null;
}
 

import com.amazonaws.services.dynamodbv2.document.Item; //导入方法依赖的package包/类
private void monitorScanners() {
	boolean incomplete = true;

	while (incomplete) {
		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
			e.printStackTrace();
			break;
		}

		incomplete = false;
		for (int i = 0; i < totalSegments; i++) {
			Item item = functionTrackerTable.getItem(SEGMENT, i);
			if (item != null) {
				String status = item.getString(STATUS);
				if (!status.equals(STATUS_DONE)) {
					incomplete = true;
				}
				if (status.equals(STATUS_INCOMPLETE)) {
					String startScoreId = item.getString(LAST_SCORE_ID);
					invokeScannerOnSegment(i, startScoreId);
				}
			} else {
				incomplete = true;
				break;
			}
		}
	}
}
 

import com.amazonaws.services.dynamodbv2.document.Item; //导入方法依赖的package包/类
@Override
public MAVLinkRecord next() {
    Item item = itemIterator.next();

    return new MAVLinkRecord(item.getString(ATTR_DEVICE_ID), new Date(item.getLong(ATTR_TIME)), item.getInt(ATTR_MSG_ID), item.getMap(ATTR_MESSAGE));
}
 

import com.amazonaws.services.dynamodbv2.document.Item; //导入方法依赖的package包/类
/**
 * Deletes all objects in a shared table, which belong to a given appid, by scanning the GSI.
 * @param appid app id
 */
public static void deleteAllFromSharedTable(String appid) {
	if (StringUtils.isBlank(appid) || !isSharedAppid(appid)) {
		return;
	}
	Pager pager = new Pager(50);
	List<WriteRequest> allDeletes = new LinkedList<>();
	Page<Item, QueryOutcome> items;
	// read all phase
	do {
		items = queryGSI(appid, pager);
		if (items == null) {
			break;
		}
		for (Item item : items) {
			String key = item.getString(Config._KEY);
			// only delete rows which belong to the given appid
			if (StringUtils.startsWith(key, appid.trim())) {
				logger.debug("Preparing to delete '{}' from shared table, appid: '{}'.", key, appid);
				pager.setLastKey(item.getString(Config._ID));
				allDeletes.add(new WriteRequest().withDeleteRequest(new DeleteRequest().
						withKey(Collections.singletonMap(Config._KEY, new AttributeValue(key)))));
			}
		}
	} while (items.iterator().hasNext());

	// delete all phase
	final int maxItems = 20;
	int batchSteps = (allDeletes.size() > maxItems) ? (allDeletes.size() / maxItems) + 1 : 1;
	List<WriteRequest> reqs = new LinkedList<>();
	Iterator<WriteRequest> it = allDeletes.iterator();
	String tableName = getTableNameForAppid(appid);
	for (int i = 0; i < batchSteps; i++) {
		while (it.hasNext() && reqs.size() < maxItems) {
			reqs.add(it.next());
		}
		if (reqs.size() > 0) {
			logger.info("Deleting {} items belonging to app '{}', from shared table (page {}/{})...",
					reqs.size(), appid, i + 1, batchSteps);
			batchWrite(Collections.singletonMap(tableName, reqs));
		}
		reqs.clear();
	}
}