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From Paul424 <...@git.apache.org>
Subject [GitHub] nifi pull request: Nifi 1516 - AWS DynamoDB Get/Put/Delete Process...
Date Wed, 20 Apr 2016 11:43:40 GMT
Github user Paul424 commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/224#discussion_r60392648
  
    --- Diff: nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/main/java/org/apache/nifi/processors/aws/dynamodb/PutDynamoDB.java
---
    @@ -0,0 +1,182 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *     http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.nifi.processors.aws.dynamodb;
    +
    +import java.io.ByteArrayOutputStream;
    +import java.io.IOException;
    +import java.util.Arrays;
    +import java.util.Collections;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.commons.io.IOUtils;
    +import org.apache.commons.lang3.StringUtils;
    +import org.apache.nifi.annotation.behavior.InputRequirement;
    +import org.apache.nifi.annotation.behavior.ReadsAttribute;
    +import org.apache.nifi.annotation.behavior.ReadsAttributes;
    +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
    +import org.apache.nifi.annotation.behavior.SupportsBatching;
    +import org.apache.nifi.annotation.behavior.WritesAttribute;
    +import org.apache.nifi.annotation.behavior.WritesAttributes;
    +import org.apache.nifi.annotation.documentation.CapabilityDescription;
    +import org.apache.nifi.annotation.documentation.SeeAlso;
    +import org.apache.nifi.annotation.documentation.Tags;
    +import org.apache.nifi.components.PropertyDescriptor;
    +import org.apache.nifi.flowfile.FlowFile;
    +import org.apache.nifi.processor.ProcessContext;
    +import org.apache.nifi.processor.ProcessSession;
    +
    +import com.amazonaws.AmazonClientException;
    +import com.amazonaws.AmazonServiceException;
    +import com.amazonaws.services.dynamodbv2.document.BatchWriteItemOutcome;
    +import com.amazonaws.services.dynamodbv2.document.DynamoDB;
    +import com.amazonaws.services.dynamodbv2.document.Item;
    +import com.amazonaws.services.dynamodbv2.document.TableWriteItems;
    +import com.amazonaws.services.dynamodbv2.model.AttributeValue;
    +import com.amazonaws.services.dynamodbv2.model.WriteRequest;
    +
    +@SupportsBatching
    +@SeeAlso({DeleteDynamoDB.class, GetDynamoDB.class})
    +@InputRequirement(Requirement.INPUT_REQUIRED)
    +@Tags({"Amazon", "DynamoDB", "AWS", "Put", "Insert"})
    +@CapabilityDescription("Puts a document from DynamoDB based on hash and range key.  The
table can have either hash and range or hash key alone."
    +        + " Currently the keys supported are string and number and value can be json
document. "
    +        + "In case of hash and range keys both key are required for the operation."
    +        + " The FlowFile content must be JSON. FlowFile content is mapped to the specified
Json Document attribute in the DynamoDB item.")
    +@WritesAttributes({
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_KEY_ERROR_UNPROCESSED,
description = "Dynamo db unprocessed keys"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_RANGE_KEY_VALUE_ERROR,
description = "Dynamod db range key error"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_KEY_ERROR_NOT_FOUND,
description = "Dynamo db key not found"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_EXCEPTION_MESSAGE,
description = "Dynamo db exception message"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_CODE, description
= "Dynamo db error code"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_MESSAGE, description
= "Dynamo db error message"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_TYPE, description
= "Dynamo db error type"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_SERVICE, description
= "Dynamo db error service"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_RETRYABLE,
description = "Dynamo db error is retryable"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_REQUEST_ID,
description = "Dynamo db error request id"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ERROR_STATUS_CODE,
description = "Dynamo db error status code"),
    +    @WritesAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ITEM_IO_ERROR, description
= "IO exception message on creating item")
    +    })
    +@ReadsAttributes({
    +    @ReadsAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ITEM_HASH_KEY_VALUE,
description = "Items hash key value" ),
    +    @ReadsAttribute(attribute = AbstractDynamoDBProcessor.DYNAMODB_ITEM_RANGE_KEY_VALUE,
description = "Items range key value" )
    +    })
    +public class PutDynamoDB extends AbstractWriteDynamoDBProcessor {
    +
    +   public static final List<PropertyDescriptor> properties = Collections.unmodifiableList(
    +            Arrays.asList(TABLE, HASH_KEY_NAME, RANGE_KEY_NAME, HASH_KEY_VALUE, RANGE_KEY_VALUE,
    +                HASH_KEY_VALUE_TYPE, RANGE_KEY_VALUE_TYPE, JSON_DOCUMENT, DOCUMENT_CHARSET,
BATCH_SIZE,
    +                REGION, ACCESS_KEY, SECRET_KEY, CREDENTIALS_FILE, AWS_CREDENTIALS_PROVIDER_SERVICE,
TIMEOUT, SSL_CONTEXT_SERVICE));
    +
    +    @Override
    +    protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
    +        return properties;
    +    }
    +
    +    @Override
    +    public void onTrigger(final ProcessContext context, final ProcessSession session)
{
    +        List<FlowFile> flowFiles = session.get(context.getProperty(BATCH_SIZE).asInteger());
    +        if (flowFiles == null || flowFiles.size() == 0) {
    +            return;
    +        }
    +
    +        Map<ItemKeys,FlowFile> keysToFlowFileMap = new HashMap<>();
    +
    +        final String table = context.getProperty(TABLE).getValue();
    +
    +        final String hashKeyName = context.getProperty(HASH_KEY_NAME).getValue();
    +        final String hashKeyValueType = context.getProperty(HASH_KEY_VALUE_TYPE).getValue();
    +        final String rangeKeyName = context.getProperty(RANGE_KEY_NAME).getValue();
    +        final String rangeKeyValueType = context.getProperty(RANGE_KEY_VALUE_TYPE).getValue();
    +        final String jsonDocument = context.getProperty(JSON_DOCUMENT).getValue();
    --- End diff --
    
    @mans2singh  @apiri I'm evaluating the PutDynamoDB processor but cannot get it to work.
I don't see how i can specify the value of the primary (partition) key using the HASH_KEY_VALUE
setting. How do i point to a given field in the flowfile record? The default value ${dynamodb.item.hash.key.value}
does not make sense to me?
    Any help is appreciated,
    Paul



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