InMemoryMapIT (Apache Accumulo Testing 2.0.0 API)

java.lang.Object
- org.apache.accumulo.test.InMemoryMapIT

```
public class InMemoryMapIT
extends Object
```
Integration Test for https://issues.apache.org/jira/browse/ACCUMULO-4148
User had problem writing one Mutation with multiple KV pairs that had the same key. Doing so should write out all pairs in all mutations with a unique id. In typical operation, you would only see the last one when scanning. User had a combiner on the table, and they noticed that when using InMemoryMap with NativeMapWrapper, only the last KV pair was ever written. When InMemoryMap used DefaultMap, all KV pairs were added and the behavior worked as expected. This IT inserts a variety of Mutations with and without the same KV pairs and then inspects result of InMemoryMap mutate, looking for unique id stored with each key. This unique id, shown as mc= in the MemKey toString, was originally used for scan Isolation. Writing the same key multiple times in the same mutation is a secondary use case, discussed in https://issues.apache.org/jira/browse/ACCUMULO-227. In addition to NativeMapWrapper and DefaultMap, LocalityGroupMap was add in https://issues.apache.org/jira/browse/ACCUMULO-112. This test has to be an IT in accumulo-test, because libaccumulo is built in 'integration-test' phase of accumulo-native, which currently runs right before accumulo-test. The tests for DefaultMap could move to a unit test in tserver, but they are here for convenience of viewing both at the same time.

Field Summary

Fields
Modifier and Type Field Description

org.junit.rules.TemporaryFolder tempFolder

Constructor Summary

Constructors
Constructor Description

InMemoryMapIT()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`ensureNativeLibrary()`
`static ServerContext`	`getServerContext()`
`void`	`testMultipleMutationsMultipleKeysSomeSame()`
`void`	`testMultipleMutationsMultipleSameKeys()`
`void`	`testMultipleMutationsOneKey()`
`void`	`testMultipleMutationsSameOneKey()`
`void`	`testMutlipleMutationsMultipleKeys()`
`void`	`testOneMutationManyKeys()`
`void`	`testOneMutationManySameKeys()`
`void`	`testOneMutationOneKey()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tempFolder

public org.junit.rules.TemporaryFolder tempFolder

Constructor Detail
- InMemoryMapIT
```
public InMemoryMapIT()
```

Method Detail

ensureNativeLibrary

public static void ensureNativeLibrary()

getServerContext

public static ServerContext getServerContext()

testOneMutationOneKey
```
public void testOneMutationOneKey()
```

testOneMutationManyKeys
```
public void testOneMutationManyKeys()
```

testOneMutationManySameKeys

public void testOneMutationManySameKeys()

testMultipleMutationsOneKey

public void testMultipleMutationsOneKey()

testMultipleMutationsSameOneKey

public void testMultipleMutationsSameOneKey()

testMutlipleMutationsMultipleKeys

public void testMutlipleMutationsMultipleKeys()

testMultipleMutationsMultipleSameKeys

public void testMultipleMutationsMultipleSameKeys()

testMultipleMutationsMultipleKeysSomeSame

public void testMultipleMutationsMultipleKeysSomeSame()