Java Code Examples for com.amazonaws.services.dynamodbv2.document.Table#query()

The following examples show how to use com.amazonaws.services.dynamodbv2.document.Table#query() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: SampleDataTryQuery.java    From aws-doc-sdk-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesInLast15DaysWithConfig(String tableName, String forumName, String threadSubject) {

        String replyId = forumName + "#" + threadSubject;
        long twoWeeksAgoMilli = (new Date()).getTime() - (15L * 24L * 60L * 60L * 1000L);
        Date twoWeeksAgo = new Date();
        twoWeeksAgo.setTime(twoWeeksAgoMilli);
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        String twoWeeksAgoStr = df.format(twoWeeksAgo);

        Table table = dynamoDB.getTable(tableName);

        QuerySpec querySpec = new QuerySpec().withKeyConditionExpression("Id = :v1 and ReplyDateTime > :v2")
            .withValueMap(new ValueMap().withString(":v1", replyId).withString(":v2", twoWeeksAgoStr))
            .withProjectionExpression("Message, ReplyDateTime, PostedBy");

        ItemCollection<QueryOutcome> items = table.query(querySpec);
        Iterator<Item> iterator = items.iterator();

        System.out.println("Query: printing results...");

        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }
    }
Example 2
Source File: DocumentAPIQuery.java    From aws-doc-sdk-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesForAThreadSpecifyOptionalLimit(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec().withKeyConditionExpression("Id = :v_id")
            .withValueMap(new ValueMap().withString(":v_id", replyId)).withMaxPageSize(1);

        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesForAThreadSpecifyOptionalLimit results:");

        // Process each page of results
        int pageNum = 0;
        for (Page<Item, QueryOutcome> page : items.pages()) {

            System.out.println("\nPage: " + ++pageNum);

            // Process each item on the current page
            Iterator<Item> item = page.iterator();
            while (item.hasNext()) {
                System.out.println(item.next().toJSONPretty());
            }
        }
    }
Example 3
Source File: DocumentAPIQuery.java    From aws-doc-sdk-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesInLast15DaysWithConfig(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        long twoWeeksAgoMilli = (new Date()).getTime() - (15L * 24L * 60L * 60L * 1000L);
        Date twoWeeksAgo = new Date();
        twoWeeksAgo.setTime(twoWeeksAgoMilli);
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        String twoWeeksAgoStr = df.format(twoWeeksAgo);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec().withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id and ReplyDateTime <= :v_reply_dt_tm")
            .withValueMap(new ValueMap().withString(":v_id", replyId).withString(":v_reply_dt_tm", twoWeeksAgoStr));

        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesInLast15DaysWithConfig results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }

    }
Example 4
Source File: DocumentAPIQuery.java    From aws-doc-sdk-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesPostedWithinTimePeriod(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        long startDateMilli = (new Date()).getTime() - (15L * 24L * 60L * 60L * 1000L);
        long endDateMilli = (new Date()).getTime() - (5L * 24L * 60L * 60L * 1000L);
        java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        String startDate = df.format(startDateMilli);
        String endDate = df.format(endDateMilli);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec().withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id and ReplyDateTime between :v_start_dt and :v_end_dt")
            .withValueMap(new ValueMap().withString(":v_id", replyId).withString(":v_start_dt", startDate)
                .withString(":v_end_dt", endDate));

        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesPostedWithinTimePeriod results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }
    }
Example 5
Source File: DocumentAPIQuery.java    From aws-doc-sdk-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesUsingAFilterExpression(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec().withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id").withFilterExpression("PostedBy = :v_postedby")
            .withValueMap(new ValueMap().withString(":v_id", replyId).withString(":v_postedby", "User B"));

        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesUsingAFilterExpression results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }
    }
Example 6
Source File: DocumentAPIQuery.java    From aws-dynamodb-examples with Apache License 2.0 6 votes vote down vote up 
private static void findRepliesUsingAFilterExpression(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);
        
        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec()
            .withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id")
            .withFilterExpression("PostedBy = :v_postedby")
            .withValueMap(new ValueMap()
                .withString(":v_id", replyId)
                .withString(":v_postedby", "User B"));
        
        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesUsingAFilterExpression results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }    
     }
Example 7
Source File: DynamoDBServiceImpl1.java    From Serverless-Programming-Cookbook with MIT License 5 votes vote down vote up 
@Override
public final Response query(final Request request) {

    Table table = dynamoDB.getTable(request.getTableName());

    final String keyConditionExpression = request.getPartitionKey() + "=:" + request.getPartitionKey();
            //+ " and " + request.getSortKey() + "=:" + request.getSortKey();

    QuerySpec querySpec = new QuerySpec()
            .withKeyConditionExpression(keyConditionExpression);

    final Map<String, Object> valueMap = new HashMap<>();
    StringBuilder filterExpressionBuilder;
    if (request.getFilterData() != null) {
        filterExpressionBuilder = new StringBuilder();
        processFilterData(request, filterExpressionBuilder, valueMap);
        //Add to QuerySpec.
        querySpec.withFilterExpression(filterExpressionBuilder.toString());
    }

    valueMap.put(":" + request.getPartitionKey(), request.getPartitionKeyValue());
    //valueMap.put(":" + request.getSortKey(), request.getSortKeyValue());
    querySpec.withValueMap(valueMap);

    ItemCollection<QueryOutcome> items = table.query(querySpec);

    StringBuilder response = new StringBuilder();
    response.append("PK of items read with query (V1): ");
    for (Item item : items) {
        response.append(prepareKeyStr(item, request));
    }

    return new Response(response.toString(), null);
}
Example 8
Source File: TryDaxTests.java    From aws-doc-sdk-examples with Apache License 2.0 5 votes vote down vote up 
void queryTest(String tableName, DynamoDB client, int pk, int sk1, int sk2, int iterations) {
    long startTime, endTime;
    System.out.println("Query test - partition key " + pk + " and sort keys between " + sk1 + " and " + sk2);
    Table table = client.getTable(tableName);

    HashMap<String, Object> valueMap = new HashMap<String, Object>();
    valueMap.put(":pkval", pk);
    valueMap.put(":skval1", sk1);
    valueMap.put(":skval2", sk2);

    QuerySpec spec = new QuerySpec()
            .withKeyConditionExpression("pk = :pkval and sk between :skval1 and :skval2")
            .withValueMap(valueMap);

    for (int i = 0; i < iterations; i++) {
        startTime = System.nanoTime();
        ItemCollection<QueryOutcome> items = table.query(spec);

        try {
            Iterator<Item> iter = items.iterator();
            while (iter.hasNext()) {
                iter.next();
            }
        } catch (Exception e) {
            System.err.println("Unable to query table:");
            e.printStackTrace();
        }
        endTime = System.nanoTime();
        printTime(startTime, endTime, iterations);
    }
}
Example 9
Source File: GettingStartedTryQuery.java    From aws-dynamodb-examples with Apache License 2.0 5 votes vote down vote up 
private static void findRepliesInLast15DaysWithConfig(
    String tableName, String forumName, String threadSubject) {

    String replyId = forumName + "#" + threadSubject;
    long twoWeeksAgoMilli = (new Date()).getTime()
        - (15L * 24L * 60L * 60L * 1000L);
    Date twoWeeksAgo = new Date();
    twoWeeksAgo.setTime(twoWeeksAgoMilli);
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
    String twoWeeksAgoStr = df.format(twoWeeksAgo);

    Table table = dynamoDB.getTable(tableName);

    QuerySpec querySpec = new QuerySpec()
        .withKeyConditionExpression("Id = :v1 and ReplyDateTime > :v2")
        .withValueMap(new ValueMap()
            .withString(":v1", replyId)
            .withString(":v2", twoWeeksAgoStr))
        .withProjectionExpression("Message, ReplyDateTime, PostedBy");

    ItemCollection<QueryOutcome> items = table.query(querySpec);
    Iterator<Item> iterator = items.iterator();

    System.out.println("Query: printing results...");

    while (iterator.hasNext()) {
        System.out.println(iterator.next().toJSONPretty());
    }
}
Example 10
Source File: DocumentAPIQuery.java    From aws-dynamodb-examples with Apache License 2.0 5 votes vote down vote up 
private static void findRepliesForAThreadSpecifyOptionalLimit(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);
        
        String replyId = forumName + "#" + threadSubject;   
               
        QuerySpec spec = new QuerySpec()
            .withKeyConditionExpression("Id = :v_id")
            .withValueMap(new ValueMap()
                .withString(":v_id", replyId))
            .withMaxPageSize(1);

        ItemCollection<QueryOutcome> items = table.query(spec);
        
        System.out.println("\nfindRepliesForAThreadSpecifyOptionalLimit results:");

        // Process each page of results
        int pageNum = 0;
        for (Page<Item, QueryOutcome> page : items.pages()) {
            
            System.out.println("\nPage: " + ++pageNum);

            // Process each item on the current page
            Iterator<Item> item = page.iterator();
            while (item.hasNext()) {
                System.out.println(item.next().toJSONPretty());
            }
        }
    }
Example 11
Source File: DocumentAPIQuery.java    From aws-dynamodb-examples with Apache License 2.0 5 votes vote down vote up 
private static void findRepliesInLast15DaysWithConfig(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        long twoWeeksAgoMilli = (new Date()).getTime() - (15L*24L*60L*60L*1000L);
        Date twoWeeksAgo = new Date();
        twoWeeksAgo.setTime(twoWeeksAgoMilli);
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        String twoWeeksAgoStr = df.format(twoWeeksAgo);
        
        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec()
            .withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id and ReplyDateTime <= :v_reply_dt_tm")
            .withValueMap(new ValueMap()
                .withString(":v_id", replyId)
                .withString(":v_reply_dt_tm", twoWeeksAgoStr));
        
        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesInLast15DaysWithConfig results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }

    }
Example 12
Source File: DocumentAPIQuery.java    From aws-dynamodb-examples with Apache License 2.0 5 votes vote down vote up 
private static void findRepliesPostedWithinTimePeriod(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        long startDateMilli = (new Date()).getTime() - (15L*24L*60L*60L*1000L); 
        long endDateMilli = (new Date()).getTime() - (5L*24L*60L*60L*1000L);    
        java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        String startDate = df.format(startDateMilli);
        String endDate = df.format(endDateMilli);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec()
            .withProjectionExpression("Message, ReplyDateTime, PostedBy")
            .withKeyConditionExpression("Id = :v_id and ReplyDateTime between :v_start_dt and :v_end_dt")
            .withValueMap(new ValueMap()
                .withString(":v_id", replyId)
                .withString(":v_start_dt", startDate)
                .withString(":v_end_dt", endDate));
        
        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesPostedWithinTimePeriod results:");
        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }    
    }
Example 13
Source File: DocumentAPIQuery.java    From aws-doc-sdk-examples with Apache License 2.0 4 votes vote down vote up 
private static void findRepliesForAThread(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        String replyId = forumName + "#" + threadSubject;

        QuerySpec spec = new QuerySpec().withKeyConditionExpression("Id = :v_id")
            .withValueMap(new ValueMap().withString(":v_id", replyId));

        ItemCollection<QueryOutcome> items = table.query(spec);

        System.out.println("\nfindRepliesForAThread results:");

        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }

    }
Example 14
Source File: MoviesQuery.java    From aws-dynamodb-examples with Apache License 2.0 4 votes vote down vote up 
public static void main(String[] args)  {

        AmazonDynamoDBClient client = new AmazonDynamoDBClient();
        client.setEndpoint("http://localhost:8000");
        DynamoDB dynamoDB = new DynamoDB(client);
       
        Table table = dynamoDB.getTable("Movies");

        HashMap<String, String> nameMap = new HashMap<String, String>();
        nameMap.put("#yr", "year"); 
        
        HashMap<String, Object> valueMap = new HashMap<String, Object>();
        valueMap.put(":yyyy", 1985);
        
        QuerySpec querySpec = new QuerySpec()
            .withKeyConditionExpression("#yr = :yyyy")
            .withNameMap(new NameMap().with("#yr", "year"))
            .withValueMap(valueMap);

        ItemCollection<QueryOutcome> items = table.query(querySpec);

        Iterator<Item> iterator = items.iterator();
        Item item = null;

        System.out.println("Movies from 1985");
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.getNumber("year") + ": " + item.getString("title"));
        }
                        
        valueMap.put(":yyyy", 1992);
        valueMap.put(":letter1", "A");
        valueMap.put(":letter2", "L");
        
        querySpec
            .withProjectionExpression("#yr, title, info.genres, info.actors[0]")
            .withKeyConditionExpression("#yr = :yyyy and title between :letter1 and :letter2")
            .withNameMap(nameMap)
            .withValueMap(valueMap);
         
        items = table.query(querySpec);
        iterator = items.iterator();
        
        System.out.println("Movies from 1992 - titles A-L, with genres and lead actor");
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.toString());
        }
       
    }
Example 15
Source File: DocumentAPIQuery.java    From aws-dynamodb-examples with Apache License 2.0 4 votes vote down vote up 
private static void findRepliesForAThread(String forumName, String threadSubject) {

        Table table = dynamoDB.getTable(tableName);

        String replyId = forumName + "#" + threadSubject;
        
        QuerySpec spec = new QuerySpec()
            .withKeyConditionExpression("Id = :v_id")
            .withValueMap(new ValueMap()
                .withString(":v_id", replyId));
        
        ItemCollection<QueryOutcome> items = table.query(spec);
        
        System.out.println("\nfindRepliesForAThread results:");

        Iterator<Item> iterator = items.iterator();
        while (iterator.hasNext()) {
            System.out.println(iterator.next().toJSONPretty());
        }
        
    }