How to get all the keys from aerospike?


How can i get all the keys from aerospike namespace like i can get keys from a map using map.keyset . I went through this link .I tried writing a similar code to this one.I wrote the code with client.xpolicy=true but i am still getting null when i display the key in scanCallback funtion.

here is my code to write a record(any help would be appriciated):

def writeToAerospike():Boolean = {

val host:Host = new Host("", 3000)
val client = new AerospikeClient(new ClientPolicy,host)
client.writePolicyDefault.sendKey = true;
client.readPolicyDefault.sendKey = true;
client.scanPolicyDefault.sendKey = true;
val policy = new WritePolicy();
policy.sendKey = true;
policy.timeout = 500;

    println("connection to aerospike client sucessful")
    client.put(policy,new Key("test", "testSet", "1"),new Bin("name", "john"))

    //verify if the record is entered correctly
    println(client.get(policy,new Key("test", "testing", "1")).getValue("name"))

   return true
return false }

I am using the code from this example to scan the records:

class ScanParallelTest extends ScanCallback {

  private var recordCount: Int = _

  def runTest() {
    val client = new AerospikeClient("", 3000)
    try {
      val policy = new ScanPolicy()
      policy.concurrentNodes = true
      policy.priority = Priority.LOW
      policy.includeBinData = true
      client.scanAll(policy, "test", "testSet", this)
      println("Records " + recordCount)
   } finally {

def scanCallback(key: Key, record: Record) {
   recordCount += 1

   println("Records " + recordCount )
   println ("key=" + " "+key.userKey.toString() +" and "+" record: "+" "+ record.bins)

Here is the error I am getting:

com.aerospike.client.AerospikeException: java.lang.NullPointerException
at com.aerospike.client.command.ScanExecutor.scanParallel(
at com.aerospike.client.AerospikeClient.scanAll(
at aerospike.asd.ScanParallelTest.runTest(ScanParallelTest.scala:23)
at aerospike.asd.test$.main(test.scala:10)
at aerospike.asd.test.main(test.scala)

Caused by: java.lang.NullPointerException
at aerospike.asd.ScanParallelTest.scanCallback(ScanParallelTest.scala:35)
at com.aerospike.client.command.ScanCommand.parseRecordResults(
at com.aerospike.client.command.MultiCommand.parseResult(
at com.aerospike.client.command.SyncCommand.execute(
at com.aerospike.client.command.ScanExecutor$
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$ Source)
at Source)

I am using Aerospike 3.1.7 library. If i only write key.toString() instead of key.userKey.toString() i get an output like this: key= test:testSet:null:[B@7a7683b1 and record: {name=john}

1 Like

@helipilot50 Sir,

I am sorry to tag you in the post like this but I read your answers on similar question. I executed your code using key.userKey.toString() it works fine. But when i tried my scanall function on the same namespace and same set. It gave me the same error as before. without the ‘userKey’ part it gives me record like this: Records 493 key= test:heliSet:null:[B@4ab63056 and record: {age=26}

Did you set the sendKey property when you pushed the data into aerospike? If you didn’t, it never saved it. The key should look something like: namespace1:setname1:username1:hashdigest so it looks like your key is null

Sir i did set the sendKey = true. But i am still getting the error.

I tried using

   client.writePolicyDefault.sendKey = true;
   client.readPolicyDefault.sendKey = true;
   client.scanPolicyDefault.sendKey = true;

The code started working for me. Thank you :smile:

1 Like

this same code available in c language… if anyone have plz share with me

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