Examples with QuerySpec com.amazonaws.services.dynamodbv2.document.spec.QuerySpec used on opensource projects

Example 11 with QuerySpec

use of com.amazonaws.services.dynamodbv2.document.spec.QuerySpec in project aws-doc-sdk-examples by awsdocs.

the class DocumentAPIQuery method findRepliesForAThreadSpecifyOptionalLimit.

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 12 with QuerySpec

use of com.amazonaws.services.dynamodbv2.document.spec.QuerySpec in project aws-doc-sdk-examples by awsdocs.

the class MoviesQuery method main.

public static void main(String[] args) throws Exception {
    AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("http://localhost:8000", "us-west-2")).build();
    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(nameMap).withValueMap(valueMap);
    ItemCollection<QueryOutcome> items = null;
    Iterator<Item> iterator = null;
    Item item = null;
    try {
        System.out.println("Movies from 1985");
        items = table.query(querySpec);
        iterator = items.iterator();
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.getNumber("year") + ": " + item.getString("title"));
        }
    } catch (Exception e) {
        System.err.println("Unable to query movies from 1985");
        System.err.println(e.getMessage());
    }
    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);
    try {
        System.out.println("Movies from 1992 - titles A-L, with genres and lead actor");
        items = table.query(querySpec);
        iterator = items.iterator();
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.getNumber("year") + ": " + item.getString("title") + " " + item.getMap("info"));
        }
    } catch (Exception e) {
        System.err.println("Unable to query movies from 1992:");
        System.err.println(e.getMessage());
    }
}

Example 13 with QuerySpec

use of com.amazonaws.services.dynamodbv2.document.spec.QuerySpec in project aws-doc-sdk-examples by awsdocs.

the class TryDaxTests method queryTest.

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 14 with QuerySpec

use of com.amazonaws.services.dynamodbv2.document.spec.QuerySpec in project athenz by yahoo.

the class DynamoDBCertRecordStoreConnection method mostUpdatedHostRecord.

private boolean mostUpdatedHostRecord(Item recordToCheck) {
    try {
        // Query all records with the same hostName / provider / service as recordToCheck
        QuerySpec spec = new QuerySpec().withKeyConditionExpression("hostName = :v_host_name").withFilterExpression("attribute_exists(provider) AND provider = :v_provider AND attribute_exists(service) AND service = :v_service").withValueMap(new ValueMap().withString(":v_host_name", recordToCheck.getString(KEY_HOSTNAME)).withString(":v_provider", recordToCheck.getString(KEY_PROVIDER)).withString(":v_service", recordToCheck.getString(KEY_SERVICE)));
        ItemCollection<QueryOutcome> outcome = itemCollectionRetryDynamoDBCommand.run(() -> hostNameIndex.query(spec));
        List<Item> allRecordsWithHost = new ArrayList<>();
        for (Item item : outcome) {
            allRecordsWithHost.add(item);
        }
        // Verify recordToCheck is the most updated record with this hostName
        return dynamoDBNotificationsHelper.isMostUpdatedRecordBasedOnAttribute(recordToCheck, allRecordsWithHost, KEY_CURRENT_TIME, KEY_PRIMARY);
    } catch (Exception ex) {
        LOGGER.error("DynamoDB mostUpdatedHostRecord failed for item: {}, error: {}", recordToCheck.toString(), ex.getMessage());
        return false;
    }
}

Example 15 with QuerySpec

use of com.amazonaws.services.dynamodbv2.document.spec.QuerySpec in project athenz by yahoo.

the class DynamoDBCertRecordStoreConnection method getUnrefreshedCertRecordsByDate.

private List<Item> getUnrefreshedCertRecordsByDate(String provider, long yesterday, String unrefreshedCertDate) {
    try {
        QuerySpec spec = new QuerySpec().withKeyConditionExpression("currentDate = :v_current_date").withFilterExpression("provider = :v_provider AND attribute_exists(hostName) AND (attribute_not_exists(lastNotifiedTime) OR lastNotifiedTime < :v_last_notified)").withValueMap(new ValueMap().withString(":v_current_date", unrefreshedCertDate).withNumber(":v_last_notified", yesterday).withString(":v_provider", provider));
        ItemCollection<QueryOutcome> outcome = itemCollectionRetryDynamoDBCommand.run(() -> currentTimeIndex.query(spec));
        List<Item> items = new ArrayList<>();
        for (Item item : outcome) {
            items.add(item);
        }
        return items;
    } catch (Exception ex) {
        LOGGER.error("DynamoDB getUnrefreshedCertRecordsByDate failed for provider: {}, date: {} error: {}", provider, unrefreshedCertDate, ex.getMessage());
    }
    return new ArrayList<>();
}