Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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91 lines
2.5 KiB
91 lines
2.5 KiB
package org.openrs2.cache
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import io.netty.buffer.ByteBuf
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import org.apache.commons.compress.archivers.tar.TarArchiveEntry
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import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream
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import java.time.Instant
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import java.util.Date
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/**
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* A specialised [Store] implementation that writes a cache in the
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* [FlatFileStore] format to a [TarArchiveOutputStream].
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*
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* The cache is not buffered to disk.
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*
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* This implementation only supports the [create] and [write] methods. All
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* other methods throw [UnsupportedOperationException].
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*
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* It is only intended for use by the cache archiving service's web interface.
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*/
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public class FlatFileStoreTarWriter(
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private val out: TarArchiveOutputStream,
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private val prefix: String = "cache/",
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timestamp: Instant = Instant.EPOCH
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) : Store {
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private val timestamp = Date.from(timestamp)
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init {
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out.putArchiveEntry(createTarEntry("", size = 0))
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out.closeArchiveEntry()
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}
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private fun createTarEntry(name: String, size: Int): TarArchiveEntry {
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val entry = TarArchiveEntry(prefix + name)
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entry.modTime = timestamp
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entry.size = size.toLong()
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return entry
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}
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override fun exists(archive: Int): Boolean {
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throw UnsupportedOperationException()
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}
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override fun exists(archive: Int, group: Int): Boolean {
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throw UnsupportedOperationException()
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}
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override fun list(): List<Int> {
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throw UnsupportedOperationException()
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}
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override fun list(archive: Int): List<Int> {
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throw UnsupportedOperationException()
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}
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override fun create(archive: Int) {
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require(archive in 0..Store.MAX_ARCHIVE)
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out.putArchiveEntry(createTarEntry("$archive/", size = 0))
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out.closeArchiveEntry()
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}
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override fun read(archive: Int, group: Int): ByteBuf {
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throw UnsupportedOperationException()
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}
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override fun write(archive: Int, group: Int, buf: ByteBuf) {
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require(archive in 0..Store.MAX_ARCHIVE)
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require(group >= 0)
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require(buf.readableBytes() <= Store.MAX_GROUP_SIZE)
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out.putArchiveEntry(createTarEntry("$archive/$group.dat", buf.readableBytes()))
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buf.readBytes(out, buf.readableBytes())
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out.closeArchiveEntry()
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}
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override fun remove(archive: Int) {
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throw UnsupportedOperationException()
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}
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override fun remove(archive: Int, group: Int) {
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throw UnsupportedOperationException()
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}
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override fun flush() {
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out.flush()
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}
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override fun close() {
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out.close()
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}
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}
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