Examples of com.amazonaws.services.dynamodbv2.model.DeleteItemRequest

Package com.amazonaws.services.dynamodbv2.model

Examples of com.amazonaws.services.dynamodbv2.model.DeleteItemRequest

com.amazonaws.services.dynamodbv2.model.DeleteItemRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodbv2.AmazonDynamoDB#deleteItem(DeleteItemRequest) DeleteItem operation}.
Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the item if it exists, or if it has an expected attribute value.

In addition to deleting an item, you can also return the item's attribute values in the same operation, using the ReturnValues parameter.

Unless you specify conditions, the DeleteItem is an idempotent operation; running it multiple times on the same item or attribute does not result in an error response.

Conditional deletes are useful for only deleting items if specific conditions are met. If those conditions are met, Amazon DynamoDB performs the delete. Otherwise, the item is not deleted.
@see com.amazonaws.services.dynamodbv2.AmazonDynamoDB#deleteItem(DeleteItemRequest)

                    internalAssertions, deleteExpression.getExpected(),
                    deleteExpression.getConditionalOperator());
            conditionOperator = deleteExpression.getConditionalOperator();
        }


        DeleteItemRequest req = applyUserAgent(new DeleteItemRequest()
            .withKey(key).withTableName(tableName)
            .withExpected(expectedValues))
            .withConditionalOperator(conditionOperator)
            .withRequestMetricCollector(config.getRequestMetricCollector())
            ;

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                    break;
                }
            }
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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        //Overlay any user provided expected values onto the generated ones
        if(deleteExpression != null && deleteExpression.getExpected() != null){
            expectedValues.putAll(deleteExpression.getExpected());
        }


        DeleteItemRequest req = applyUserAgent(new DeleteItemRequest()
            .withKey(key).withTableName(tableName)
            .withExpected(expectedValues))
            .withRequestMetricCollector(config.getRequestMetricCollector())
            ;
        db.deleteItem(req);

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        //Overlay any user provided expected values onto the generated ones
        if(deleteExpression != null && deleteExpression.getExpected() != null){
            expectedValues.putAll(deleteExpression.getExpected());
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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                    break;
                }
            }
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

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import com.fasterxml.jackson.core.JsonToken;


public class DeleteItemRequestJsonUnmarshaller implements Unmarshaller<DeleteItemRequest, JsonUnmarshallerContext> {


  public DeleteItemRequest unmarshall(JsonUnmarshallerContext context) throws Exception {
    DeleteItemRequest request = new DeleteItemRequest();


    int originalDepth = context.getCurrentDepth();
    int targetDepth = originalDepth + 1;


    JsonToken token = context.currentToken;
    if (token == null) token = context.nextToken();


    while (true) {
      if (token == null) break;


      if (token == JsonToken.FIELD_NAME || token == JsonToken.START_OBJECT) {
        if (context.testExpression("TableName", targetDepth)) {
          context.nextToken();
          request.setTableName(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
        if (context.testExpression("Key", targetDepth)) {
                    request.setKey(new MapUnmarshaller<String, AttributeValue>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance(), AttributeValueJsonUnmarshaller.getInstance()).unmarshall(context));
        }
        if (context.testExpression("Expected", targetDepth)) {
          request.setExpected(new MapUnmarshaller<String, ExpectedAttributeValue>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance(), ExpectedAttributeValueJsonUnmarshaller.getInstance()).unmarshall(context));
        }
        if (context.testExpression("ReturnValues", targetDepth)) {
          context.nextToken();
          request.setReturnValues(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance().unmarshall(context));
        }
      } else if (token == JsonToken.END_ARRAY || token == JsonToken.END_OBJECT) {
        if (context.getCurrentDepth() <= originalDepth) break;
      }
      token = context.nextToken();

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    public void deleteItem() {
        createGenericTable(tableName);


        AttributeValue hash = new AttributeValue("ad"); //createStringAttribute();
        getClient().putItem(new PutItemRequest().withTableName(tableName).withItem(createGenericItem(hash)));
        DeleteItemRequest request = new DeleteItemRequest().withTableName(tableName).withKey(createItemKey("id", hash));
        DeleteItemResult res = getClient().deleteItem(request);


        Assert.assertNotNull(res.getConsumedCapacity());
        Assert.assertEquals(tableName, res.getConsumedCapacity().getTableName());
        Assert.assertNotNull(res.getConsumedCapacity().getCapacityUnits());

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        AttributeValue range1 = new AttributeValue().withN("1");
        AttributeValue range2 = new AttributeValue().withN("2");
        getClient().putItem(new PutItemRequest().withTableName(tableName).withItem(createGenericItem(hash, range1)));
        getClient().putItem(new PutItemRequest().withTableName(tableName).withItem(createGenericItem(hash, range2)));


        DeleteItemRequest request1 = new DeleteItemRequest().withTableName(tableName).withKey(createItemKey("id", hash, "range", range1)).withReturnValues(ReturnValue.ALL_OLD);
        DeleteItemRequest request2 = new DeleteItemRequest().withTableName(tableName).withKey(createItemKey("id", hash, "range", range2)).withReturnValues(ReturnValue.ALL_OLD);
        DeleteItemResult result = getClient().deleteItem(request1);


        Assert.assertNotNull(result.getAttributes());


        result = getClient().deleteItem(request2);

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    public void deleteItemWithoutTableName() {
        createGenericTable(tableName);


        AttributeValue hash = createStringAttribute();
        getClient().putItem(new PutItemRequest().withTableName(tableName).withItem(createGenericItem(hash)));
        DeleteItemRequest request = new DeleteItemRequest().withKey(createItemKey("id", hash));


    try {
      getClient().deleteItem(request);
      Assert.assertTrue(false);// Should have thrown an exception
    } catch (AmazonServiceException ase) {

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    @Test
    public void deleteNonExistentItem() {
        createGenericTable(tableName);


        DeleteItemRequest request = new DeleteItemRequest().withTableName(tableName).withKey(createItemKey("id", createStringAttribute()));
    try {
      getClient().deleteItem(request);
      Assert.assertTrue(false);// Should have thrown an exception
    } catch (AmazonServiceException ase) {
    }

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