DBot/kommons
DBot/kommons
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While BTreeDB6 was a fun little project, it is inferior to SQLite in all ways

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This commit is contained in:
DBotThePony 2024-05-31 10:39:06 +07:00
parent 373b7ce682
commit 1f6eb023ed
Signed by: DBot
GPG Key ID: DCC23B5715498507
7 changed files with 2 additions and 1275 deletions
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2
gradle.properties
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@ -4,7 +4,7 @@ kotlin.code.style=official
specifyKotlinAsDependency=false
projectGroup=ru.dbotthepony.kommons
projectVersion=2.18.1
projectVersion=3.0.0
guavaDepVersion=33.0.0
gsonDepVersion=2.8.9

1103
src/main/kotlin/ru/dbotthepony/kommons/io/BTreeDB6.kt
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File diff suppressed because it is too large Load Diff

102
src/main/kotlin/ru/dbotthepony/kommons/io/ByteKey.kt
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@ -1,102 +0,0 @@
package ru.dbotthepony.kommons.io
import java.io.InputStream
import java.io.OutputStream
import java.util.UUID
private fun toBytes(key: UUID): ByteArray {
val value = ByteArray(16)
value[0] = ((key.mostSignificantBits ushr 56) and 0xFFL).toByte()
value[1] = ((key.mostSignificantBits ushr 48) and 0xFFL).toByte()
value[2] = ((key.mostSignificantBits ushr 40) and 0xFFL).toByte()
value[3] = ((key.mostSignificantBits ushr 32) and 0xFFL).toByte()
value[4] = ((key.mostSignificantBits ushr 24) and 0xFFL).toByte()
value[5] = ((key.mostSignificantBits ushr 16) and 0xFFL).toByte()
value[6] = ((key.mostSignificantBits ushr 8) and 0xFFL).toByte()
value[7] = ((key.mostSignificantBits ushr 0) and 0xFFL).toByte()
value[8 + 0] = ((key.leastSignificantBits ushr 56) and 0xFFL).toByte()
value[8 + 1] = ((key.leastSignificantBits ushr 48) and 0xFFL).toByte()
value[8 + 2] = ((key.leastSignificantBits ushr 40) and 0xFFL).toByte()
value[8 + 3] = ((key.leastSignificantBits ushr 32) and 0xFFL).toByte()
value[8 + 4] = ((key.leastSignificantBits ushr 24) and 0xFFL).toByte()
value[8 + 5] = ((key.leastSignificantBits ushr 16) and 0xFFL).toByte()
value[8 + 6] = ((key.leastSignificantBits ushr 8) and 0xFFL).toByte()
value[8 + 7] = ((key.leastSignificantBits ushr 0) and 0xFFL).toByte()
return value
}
class ByteKey private constructor(private val bytes: ByteArray, mark: Nothing?) : Comparable<ByteKey> {
constructor(vararg bytes: Byte) : this(bytes, null)
constructor(key: String) : this(key.toByteArray(), null)
constructor(key: UUID) : this(toBytes(key), null)
override fun equals(other: Any?): Boolean {
return this === other || other is ByteKey && other.bytes.contentEquals(bytes)
}
val size: Int
get() = bytes.size
operator fun get(index: Int): Byte {
return bytes[index]
}
fun write(stream: OutputStream) {
stream.writeVarInt(bytes.size)
stream.write(bytes)
}
fun writeRaw(stream: OutputStream) {
stream.write(bytes)
}
fun toByteArray(): ByteArray {
return bytes.clone()
}
override fun hashCode(): Int {
return bytes.contentHashCode()
}
override fun toString(): String {
return "ByteKey[${bytes.map { it.toInt() and 0xFF }.joinToString(", ")}]"
}
override fun compareTo(other: ByteKey): Int {
val cmp = size.compareTo(other.size)
if (cmp != 0) return cmp
for (i in bytes.indices) {
if (bytes[i].toInt() and 0xFF > other.bytes[i].toInt() and 0xFF) {
return 1
} else if (bytes[i].toInt() and 0xFF < other.bytes[i].toInt() and 0xFF) {
return -1
}
}
return 0
}
companion object {
/**
* Constructs [ByteKey] without any copying of provided array
*/
@JvmStatic
fun wrap(bytes: ByteArray): ByteKey {
return ByteKey(bytes, null)
}
@JvmStatic
fun read(stream: InputStream): ByteKey {
return stream.readByteKey()
}
@JvmStatic
fun readRaw(stream: InputStream, size: Int): ByteKey {
return stream.readByteKeyRaw(size)
}
}
}

2
src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt
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@ -43,7 +43,7 @@ import kotlin.concurrent.withLock
* to avoid structure corruption a lock is employed.
*
* Attached delegates can be safely mutated by multiple threads concurrently
* (attached [ListenableDelegate] can call [Listenable.addListener] callback concurrently).
* (attached [ListenableDelegate] can call [Listenable.addListener] callback from different threads).
*/
@Suppress("UNCHECKED_CAST", "UNUSED")
class DelegateSyncher : Observer {

8
src/main/kotlin/ru/dbotthepony/kommons/io/InputStreamUtils.kt
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@ -327,11 +327,3 @@ fun InputStream.readByteArray(maxRead: Int = Int.MAX_VALUE): ByteArray {
throw IllegalArgumentException("Trying to read $size bytes when $maxRead is the max allowed")
return readOrError(ByteArray(size))
}
fun InputStream.readByteKey(): ByteKey {
return ByteKey(*ByteArray(readVarInt()).also { read(it) })
}
fun InputStream.readByteKeyRaw(size: Int): ByteKey {
return ByteKey(*ByteArray(size).also { read(it) })
}

8
src/main/kotlin/ru/dbotthepony/kommons/io/OutputStreamUtils.kt
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@ -327,11 +327,3 @@ fun OutputStream.writeByteArray(value: ByteArray, offset: Int, length: Int) {
writeVarInt(length)
write(value, offset, length)
}
fun OutputStream.writeByteKey(key: ByteKey) {
key.write(this)
}
fun OutputStream.writeRawByteKey(key: ByteKey) {
key.writeRaw(this)
}

52
src/test/kotlin/ru/dbotthepony/kommons/test/BTreeDB6Tests.kt
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@ -1,52 +0,0 @@
package ru.dbotthepony.kommons.test
import org.junit.jupiter.api.DisplayName
import org.junit.jupiter.api.Test
import ru.dbotthepony.kommons.io.BTreeDB6
import ru.dbotthepony.kommons.io.ByteKey
import java.io.File
import java.util.concurrent.Executor
import kotlin.test.assertEquals
object BTreeDB6Tests {
@Test
@DisplayName("BTreeDB6 Tests")
fun test() {
val file = File("dbtest.bdb")
if (file.exists()) file.delete()
val create = BTreeDB6.create(file, 4096, sync = false)
for (i in 0 .. 800) {
val s = "This is key $i"
val k = ByteKey("This is key $i")
create.write(k, s.toByteArray())
assertEquals(s, String(create.read(k).get()))
}
for (i in 0 .. 800) {
val s = "This is key $i"
val k = ByteKey("This is key $i")
assertEquals(s, String(create.read(k).get()))
}
for (i in 0 .. 800) {
val s = "This is key $i"
val k = ByteKey("This is key $i")
create.write(k, s.toByteArray())
assertEquals(s, String(create.read(k).get()))
}
create.close()
val create2 = BTreeDB6(file)
for (i in 0 .. 800) {
val s = "This is key $i"
val k = ByteKey("This is key $i")
assertEquals(s, String(create2.read(k).get()))
}
create2.checkFreeBitmap()
create2.close()
}
}