Get specific bins in node.js

mlabour · April 29, 2015, 2:17pm

The AerospikeClient in java has a get method that allows to only request specific bins for a Record.

[...] public final Record get(Policy policy, Key key, String... binNames) [...]

It looks like the Aeroskipe client ‘select’ function in node.js is equivalent.

[...] client.select(key, bins, function ( err, bins, metadata, key) { [...]

Please can you confirm?

Thank you for your help

gayathri · April 29, 2015, 2:50pm

Hi mlabour,

Yes, they are same, selecting few bins in a record.

Here is the link to documentation.

https://github.com/aerospike/aerospike-client-nodejs/blob/master/docs/client.md#select

mlabour · April 29, 2015, 3:07pm

Hi gayathri

Thank you for your reply. May I ask a follow up question. Is there a way to batch get items and specified an array of bins to retrieve in node.js?

I believe it is possible in java

[...]public final Record[] get(BatchPolicy policy, Key[] keys, String... binNames) [...]

Thank you

gayathri · April 30, 2015, 8:47am

Hi Mlabour,

We are in the process of releasing that API. We are doing internal QA. Should be available within this week. Will update you once we make an official release.

Thanks

Gayathri.K

mlabour · May 4, 2015, 10:18pm

Awesome. We are looking forward to the new release. Thank you very much for this great library. There are also the following 2 features that we ended up implementing.

ability to nuke a set/ delete all keys in a set.
batch put an array of key values. right now we created a synthetic batchPut that loops through an array and put. We could certainly create a UDF piece of code as well for that. Let me know if u want us to contribute the code that we created for 1 and 2. Cheers -matthieu

gayathri · May 5, 2015, 6:17am

Hi Mlabour,

We released version 1.0.38 with the ability to select bins in a batch API call. You can use them and give us your feedback.

Regarding set-delete, there’s an asinfo command to delete the set. That is all the records in the given set is deleted. But note that it’s a lazy deletion. Set is marked as deleted and a thread garbage collects these records in the background. The command for set delete is

asinfo -v "set-config:context=namespace;id=<name space>;set=<set name>;set-delete=true;"

where:

<name space> is the namespace containing the set
<set name> is the name of the set to delete.

The same info command can be used through nodejs API. Here is the example demonstrating info command usage.

github.com

aerospike/aerospike-client-nodejs/blob/master/examples/info.js

#!/usr/bin/env node
// *****************************************************************************
// Copyright 2013-2019 Aerospike, Inc.
//
// Licensed 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.
// *****************************************************************************

const shared = require('./shared')

shared.runner()

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Regarding batchPut API, currently we do not support writing in batch to Aerospike server. Will update you as and when we support this in our server.

Thanks

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