Example usage for com.amazonaws.services.dynamodbv2.document Item fromJSON

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.document Item fromJSON.

Prototype

public static Item fromJSON(String json) 

Source Link

Document

Convenient factory method - instantiates an Item from the given JSON string.

Usage

From source file:com.eho.dynamodb.DynamoDBConnection.java

public static PutItemOutcome upload_resource_old(String resource) throws Exception {
    String id;//from www  . j  a v a  2s.  c o m
    JSONObject json_resource = new JSONObject(resource);
    //does the resource have a primary key?
    if (json_resource.has(PRIMARY_KEY))//if it does not have a primary key, create one using uuid
        id = json_resource.getString(PRIMARY_KEY);
    else
        id = UUID.randomUUID().toString();

    DynamoDB dynamoDB = new DynamoDB(dynamoDBClient);
    Table table = dynamoDB.getTable(PATIENT_TABLE);

    //lets retreive based on the key. if key invalid (not assigned yet) nullis returned.
    Item retreived_item = table.getItem(PRIMARY_KEY, id);
    if (retreived_item == null)//if null instantiate it
    {
        retreived_item = new Item();
        retreived_item.withPrimaryKey(PRIMARY_KEY, id);
    }

    Integer new_version = retreived_item.getInt("version") + 1;
    retreived_item.withInt("version", new_version);

    Item item_to_upload = Item.fromJSON(retreived_item.toJSONPretty()).withJSON("Document", resource);
    PutItemSpec putItemSpec = new PutItemSpec().withItem(item_to_upload).withReturnValues(ReturnValue.NONE);
    return table.putItem(putItemSpec);
}

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From source file:jp.classmethod.aws.dynamodb.DynamoDbRepository.java

License:Open Source License

/**
 * converts a Jackson annotated domain object to a DynamoDB document (item)
 * @param domain the object to convert//from   ww  w.  j a  v a2 s  .c  o m
 * @return a DynamoDB Document representation of the domain object
 */
<T> Item convertDomainToItem(T domain) {
    return Item.fromJSON(convertDomainToJSON(domain));
}

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From source file:org.eluder.logback.ext.dynamodb.appender.DynamoDbAppender.java

License:Open Source License

@Override
protected void handle(final ILoggingEvent event, final String encoded) throws Exception {
    Item item = Item.fromJSON(encoded).withPrimaryKey(createEventId(event));
    Map<String, AttributeValue> attributes = InternalUtils.toAttributeValues(item);
    PutItemRequest request = new PutItemRequest(table, attributes);
    String errorMessage = format("Appender '%s' failed to send logging event '%s' to DynamoDB table '%s'",
            getName(), event, table);/*from   w w  w .  ja  v  a 2s.com*/
    CountDownLatch latch = new CountDownLatch(isAsyncParent() ? 0 : 1);
    dynamoDb.putItemAsync(request,
            new LoggingEventHandler<PutItemRequest, PutItemResult>(this, latch, errorMessage));
    AppenderExecutors.awaitLatch(this, latch, getMaxFlushTime());
}

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