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

Package com.amazonaws.services.dynamodbv2.model

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

com.amazonaws.services.dynamodbv2.model.GetItemRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodbv2.AmazonDynamoDB#getItem(GetItemRequest) GetItem operation}.
The GetItem operation returns a set of attributes for the item with the given primary key. If there is no matching item, GetItem does not return any data.

GetItem provides an eventually consistent read by default. If your application requires a strongly consistent read, set ConsistentRead to true . Although a strongly consistent read might take more time than an eventually consistent read, it always returns the last updated value.
@see com.amazonaws.services.dynamodbv2.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(new MapUnmarshaller<String, AttributeValue>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance(), AttributeValueJsonUnmarshaller.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(createItemKey("id", 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(createItemKey("id", 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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        config = mergeConfig(config);


        String tableName = getTableName(clazz, config);


        GetItemRequest rq = new GetItemRequest()
            .withRequestMetricCollector(config.getRequestMetricCollector());


        Map<String, AttributeValue> key = getKey(keyObject, clazz);


        rq.setKey(key);
        rq.setTableName(tableName);
        rq.setConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT);




        GetItemResult item = db.getItem(applyUserAgent(rq));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {

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        config = mergeConfig(config);


        String tableName = getTableName(clazz, config);


        GetItemRequest rq = new GetItemRequest()
            .withRequestMetricCollector(config.getRequestMetricCollector());


        Map<String, AttributeValue> key = getKey(keyObject, clazz);


        rq.setKey(key);
        rq.setTableName(tableName);
        rq.setConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT);




        GetItemResult item = db.getItem(applyUserAgent(rq));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {

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    if (StringUtils.isBlank(key) || StringUtils.isBlank(cf)) {
      return null;
    }
    Map<String, AttributeValue> row = null;
    try {
      GetItemRequest getItemRequest = new GetItemRequest(cf,
          Collections.singletonMap(Config._KEY, new AttributeValue(key)));
      GetItemResult res = client().getItem(getItemRequest);
      if (res != null && res.getItem() != null && !res.getItem().isEmpty()) {
        row = res.getItem();
      }

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        config = mergeConfig(config);


        String tableName = getTableName(clazz, config);
        
        GetItemRequest rq = new GetItemRequest();


        Map<String, AttributeValue> key = getKey(keyObject, clazz);
        
        rq.setKey(key);
        rq.setTableName(tableName);
        rq.setConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT);




        GetItemResult item = db.getItem(applyUserAgent(rq));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {

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        config = mergeConfig(config);


        String tableName = getTableName(clazz, config);


        GetItemRequest rq = new GetItemRequest();


        Map<String, AttributeValue> key = getKey(keyObject, clazz);


        rq.setKey(key);
        rq.setTableName(tableName);
        rq.setConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT);




        GetItemResult item = db.getItem(applyUserAgent(rq));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {

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        config = mergeConfig(config);


        String tableName = getTableName(clazz, config);
        
        GetItemRequest rq = new GetItemRequest();


        Map<String, AttributeValue> key = getKey(keyObject, clazz);
        
        rq.setKey(key);
        rq.setTableName(tableName);
        rq.setConsistentRead(config.getConsistentReads() == ConsistentReads.CONSISTENT);




        GetItemResult item = db.getItem(applyUserAgent(rq));
        Map<String, AttributeValue> itemAttributes = item.getItem();
        if ( itemAttributes == null ) {

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