List of usage examples for com.amazonaws.services.dynamodbv2.document Item withPrimaryKey
public Item withPrimaryKey(String hashKeyName, Object hashKeyValue)
From source file:com.eho.dynamodb.DynamoDBConnection.java
public static PutItemOutcome upload_resource_old(String resource) throws Exception { String id;//from w ww . 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); }
From source file:com.eho.dynamodb.DynamoDBConnection.java
public static String upload_resource(BaseResource resource, String primary_key /* if no primary key in case of post, send null*/ ) throws Exception { String id = add_primary_as_extension(resource, primary_key); String resource_string = DynamoDBConnection.fCtx.newJsonParser().setPrettyPrint(true) .encodeResourceToString(resource); ;/*from w w w.j av a 2 s.com*/ 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); retreived_item.withInt("version", -1); } Integer new_version = retreived_item.getInt("version") + 1; retreived_item.withInt("version", new_version); Item item_to_upload = retreived_item//Item.fromJSON(retreived_item.toJSONPretty()) .withString("text" + new_version.toString(), resource_string) .withMap("json-document", new ObjectMapper().readValue(resource_string, LinkedHashMap.class)); PutItemSpec putItemSpec = new PutItemSpec().withItem(item_to_upload); table.putItem(putItemSpec); return id; }
From source file:com.eho.dynamodb.DynamoDBConnection.java
public static UpdateItemOutcome update_resource(String resource) throws Exception { String id;// w ww . j a va 2 s. 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); String new_version_str = new_version.toString(); UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey(PRIMARY_KEY, id) .withUpdateExpression("SET " + new_version_str + "= :newval") .withValueMap(new ValueMap().withString(":newval", resource)).withReturnValues(ReturnValue.ALL_NEW); return table.updateItem(updateItemSpec); }