support MapStore, which any map can be used with (eg. MapDB)

build.gradle

@@ -1,5 +1,5 @@
 group 'kweb'
-version '0.4.1'
+version '0.4.2'
 
 buildscript {
     ext.kotlin_version = '1.4.0'
@@ -54,7 +54,6 @@ dependencies {
     implementation 'org.lmdbjava:lmdbjava:0.7.0'
     compile "org.jetbrains.kotlinx:kotlinx-serialization-core:1.0.0-RC"
     implementation "org.jetbrains.kotlinx:kotlinx-serialization-protobuf:1.0.0-RC"
-    implementation "org.mapdb:mapdb:3.0.8"
 
     testImplementation "io.kotest:kotest-runner-junit5-jvm:4.2.3"
     testImplementation "io.kotest:kotest-assertions-core-jvm:4.2.3"

src/main/kotlin/kweb/shoebox/stores/LmdbStore.kt

@@ -20,6 +20,7 @@ val defaultGson: Gson = Converters.registerAll(GsonBuilder()).let {
     it.registerTypeAdapter(object : TypeToken<Duration>() {}.type, DurationConverter())
 }.create()
 */
+@Deprecated("Should be used via MapStore")
 class LmdbStore<T : Any>(val name: String, private val kSerializer: KSerializer<T>) : Store<T> {
 
     companion object {

src/main/kotlin/kweb/shoebox/stores/MapDBStore.kt → src/main/kotlin/kweb/shoebox/stores/MapStore.kt

@@ -5,18 +5,12 @@ import kotlinx.serialization.KSerializer
 import kotlinx.serialization.protobuf.ProtoBuf
 import kweb.shoebox.KeyValue
 import kweb.shoebox.Store
-import org.mapdb.DB
-import org.mapdb.HTreeMap
-import org.mapdb.Serializer
 
 /**
  * Created by ian on 3/22/17.
  */
 @ExperimentalSerializationApi
-class MapDBStore<T : Any>(private val db: DB, private val name: String, private val serializer: KSerializer<T>) : Store<T> {
-    private val map: HTreeMap<String, ByteArray> = db
-            .hashMap(name, Serializer.STRING, Serializer.BYTE_ARRAY)
-            .createOrOpen()
+class MapStore<T : Any>(private val map : MutableMap<String, ByteArray>, private val name: String, private val serializer: KSerializer<T>) : Store<T> {
 
     override val entries: Iterable<KeyValue<T>>
         get() = map.map { (k, v) ->
@@ -33,7 +27,7 @@ class MapDBStore<T : Any>(private val db: DB, private val name: String, private
     }
 
     override fun get(key: String): T? {
-        val v = map.get(key)
+        val v = map[key]
         return if (v == null) {
             null
         } else {
@@ -42,9 +36,8 @@ class MapDBStore<T : Any>(private val db: DB, private val name: String, private
     }
 
     override fun set(key: String, value: T): T? {
-        val v = map.get(key)
+        val v = map[key]
         map.set(key, ProtoBuf.encodeToByteArray(serializer, value))
-        db.commit()
         return if (v == null) {
             null
         } else {