Examples of com.amazonaws.services.dynamodb.model.GetItemRequest

Package com.amazonaws.services.dynamodb.model

Examples of com.amazonaws.services.dynamodb.model.GetItemRequest

com.amazonaws.services.dynamodb.model.GetItemRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodb.AmazonDynamoDB#getItem(GetItemRequest) GetItem operation}.
Retrieves a set of Attributes for an item that matches the primary key.

The GetItem operation provides an eventually-consistent read by default. If eventually-consistent reads are not acceptable for your application, use ConsistentRead . Although this operation might take longer than a standard read, it always returns the last updated value.
@see com.amazonaws.services.dynamodb.AmazonDynamoDB#getItem(GetItemRequest)

import com.fasterxml.jackson.core.JsonToken;


public class GetItemRequestJsonUnmarshaller implements Unmarshaller<GetItemRequest, JsonUnmarshallerContext> {


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


        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;
        boolean inArray = false;
        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("Key", targetDepth)) {
                    request.setKey(KeyJsonUnmarshaller.getInstance().unmarshall(context));
                }
                if (context.testExpression("TableName", targetDepth)) {
                    context.nextToken();
                    request.setTableName(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance().unmarshall(context));
                }
                if (context.testExpression("ConsistentRead", targetDepth)) {
                    request.setConsistentRead(SimpleTypeJsonUnmarshallers.BooleanJsonUnmarshaller.getInstance().unmarshall(context));
                }
                if (context.testExpression("AttributesToGet",targetDepth)) {
                    request.setAttributesToGet(new ListUnmarshaller<String>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance()).unmarshall(context));
                }
            }
            else if (token == JsonToken.END_ARRAY || token == JsonToken.END_OBJECT) {
                if (context.getCurrentDepth() <= originalDepth) break;
            }

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    // TODO: test out put item expected and return value
    @Test
    public void getItemTest() {
        AttributeValue hash = createItem(tableName);
        GetItemRequest request = new GetItemRequest().withTableName(tableName);
        request.setKey(new Key().withHashKeyElement(hash));
        GetItemResult res = getClient().getItem(request);
        Assert.assertNotNull(res.getItem());
        Assert.assertEquals(res.getItem().get("id"), hash);
    }

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        Assert.assertEquals(res.getItem().get("id"), hash);
    }


    @Test
    public void getItemWithoutTableNameTest() {
        GetItemRequest request = new GetItemRequest();
        request.setKey(new Key().withHashKeyElement(new AttributeValue().withNS("123")));
    try {
      getClient().getItem(request);
      Assert.assertTrue(false);// Should have thrown an exception
    } catch (AmazonServiceException ase) {
    }

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    }
    }


    @Test
    public void getItemWithoutKeyTest() {
        GetItemRequest request = new GetItemRequest();
        request.setTableName(tableName);
    try {
      getClient().getItem(request);
      Assert.assertTrue(false);// Should have thrown an exception
    } catch (AmazonServiceException ase) {
    }

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                        + DynamoDBRangeKey.class);
            }
            rangeKeyElement = getRangeKeyElement(rangeKey, rangeKeyMethod);
        }


        GetItemResult item = db.getItem(applyUserAgent(new GetItemRequest().withTableName(tableName)
                .withKey(new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement))
                .withConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT)));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {
            return null;

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                        + DynamoDBRangeKey.class);
            }
            rangeKeyElement = getRangeKeyElement(rangeKey, rangeKeyMethod);
        }


        GetItemResult item = db.getItem(applyUserAgent(new GetItemRequest().withTableName(tableName)
                .withKey(new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement))
                .withConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT)));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {
            return null;

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                        + DynamoDBRangeKey.class);
            }
            rangeKeyElement = getRangeKeyElement(rangeKey, rangeKeyMethod);
        }


        GetItemResult item = db.getItem(applyUserAgent(new GetItemRequest().withTableName(tableName)
                .withKey(new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement))
                .withConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT)));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {
            return null;

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                        + DynamoDBRangeKey.class);
            }
            rangeKeyElement = getRangeKeyElement(rangeKey, rangeKeyMethod);
        }


        GetItemResult item = db.getItem(applyUserAgent(new GetItemRequest().withTableName(tableName)
                .withKey(new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement))
                .withConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT)));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {
            return null;

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