Example usage for com.amazonaws.services.dynamodbv2.document.utils NameMap NameMap

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.document.utils NameMap NameMap.

Prototype

NameMap

Source Link

Usage

From source file:com.erudika.para.persistence.AWSDynamoDAO.java

License:Apache License

private <P extends ParaObject> String readPageFromSharedTable(String appid, Pager pager,
        LinkedList<P> results) {
    String lastKeyFragment = "";
    ValueMap valueMap = new ValueMap().withString(":aid", appid);
    NameMap nameMap = null;// w w  w  .jav  a 2  s. co m

    if (!StringUtils.isBlank(pager.getLastKey())) {
        lastKeyFragment = " and #stamp > :ts";
        valueMap.put(":ts", pager.getLastKey());
        nameMap = new NameMap().with("#stamp", Config._TIMESTAMP);
    }

    Index index = getSharedIndex();
    QuerySpec spec = new QuerySpec().withMaxPageSize(pager.getLimit()).withMaxResultSize(pager.getLimit())
            .withKeyConditionExpression(Config._APPID + " = :aid" + lastKeyFragment).withValueMap(valueMap)
            .withNameMap(nameMap);

    if (index != null) {
        Page<Item, QueryOutcome> items = index.query(spec).firstPage();
        for (Item item : items) {
            P obj = ParaObjectUtils.setAnnotatedFields(item.asMap());
            if (obj != null) {
                results.add(obj);
            }
        }
    }

    if (!results.isEmpty()) {
        return Long.toString(results.peekLast().getTimestamp());
    } else {
        return null;
    }
}

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From source file:com.netflix.hollow.example.producer.infrastructure.DynamoDBAnnouncer.java

License:Apache License

@Override
public void announce(long stateVersion) {
    Table table = dynamoDB.getTable(tableName);

    UpdateItemSpec updateItemSpec = new UpdateItemSpec().withPrimaryKey("namespace", blobNamespace)
            .withUpdateExpression("set #version = :ver").withNameMap(new NameMap().with("#version", "version"))
            .withValueMap(new ValueMap().withNumber(":ver", stateVersion));

    table.updateItem(updateItemSpec);//from w  ww  .  ja va  2 s . c o  m
}

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From source file:org.chodavarapu.jgitaws.repositories.RefRepository.java

License:Eclipse Distribution License

public Observable<Boolean> compareAndPut(String repositoryName, Ref oldRef, Ref newRef) {
    boolean isSymbolic = newRef.isSymbolic();
    boolean isPeeled = newRef.isPeeled();
    String target = newRef.isSymbolic() ? newRef.getTarget().getName() : newRef.getObjectId().name();

    logger.debug("Saving ref {} -> {} in repository {}", newRef.getName(), target, repositoryName);

    UpdateItemSpec updateSpec = new UpdateItemSpec()
            .withPrimaryKey(new PrimaryKey(new KeyAttribute(REPOSITORY_NAME_ATTRIBUTE, repositoryName),
                    new KeyAttribute(NAME_ATTRIBUTE, newRef.getName())));

    StringBuilder updateExpression = new StringBuilder(COMPARE_AND_PUT_EXPRESSION);
    ValueMap valueMap = new ValueMap().withString(":target", target).withBoolean(":isSymbolic", isSymbolic)
            .withBoolean(":isPeeled", isPeeled);

    if (isPeeled && newRef.getPeeledObjectId() != null) {
        updateExpression.append(", ");
        updateExpression.append(PEELED_TARGET_ATTRIBUTE);
        updateExpression.append(" = :peeledTarget");
        valueMap = valueMap.withString(":peeledTarget", newRef.getPeeledObjectId().name());
    }//from w  ww .j a  va 2  s .  co m

    if (oldRef != null && oldRef.getStorage() != Ref.Storage.NEW) {
        String expected = oldRef.isSymbolic() ? oldRef.getTarget().getName() : oldRef.getObjectId().name();
        updateSpec = updateSpec.withConditionExpression("#target = :expected")
                .withNameMap(new NameMap().with("#target", TARGET_ATTRIBUTE));
        valueMap = valueMap.withString(":expected", expected);
    }

    updateSpec = updateSpec.withUpdateExpression(updateExpression.toString()).withValueMap(valueMap);

    return configuration.getDynamoClient()
            .updateItem(configuration.getRefsTableName(), updateSpec, tableCreator).map(v -> true)
            .doOnNext(v -> logger.debug("Saved ref {} in repository {}", newRef.getName(), repositoryName))
            .onErrorReturn(t -> false);
}

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From source file:org.chodavarapu.jgitaws.repositories.RefRepository.java

License:Eclipse Distribution License

public Observable<Boolean> compareAndRemove(String repositoryName, Ref ref) {
    String expected = ref.isSymbolic() ? ref.getTarget().getName() : ref.getObjectId().name();
    logger.debug("Removing ref {} -> {} from repository {}", ref.getName(), expected, repositoryName);

    return configuration.getDynamoClient()
            .deleteItem(configuration.getRefsTableName(), new DeleteItemSpec()
                    .withPrimaryKey(new PrimaryKey(new KeyAttribute(REPOSITORY_NAME_ATTRIBUTE, repositoryName),
                            new KeyAttribute(NAME_ATTRIBUTE, ref.getName())))
                    .withConditionExpression("#target = :expected")
                    .withNameMap(new NameMap().with("#target", TARGET_ATTRIBUTE))
                    .withValueMap(new ValueMap().with(":expected", expected)))
            .map(v -> true).doOnNext(v -> logger.debug("Removed ref {} -> {} from repository {}", ref.getName(),
                    expected, repositoryName))
            .onErrorReturn(t -> false);
}

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