A simple JVM library with utilitarian methods for working with text files of any size, including merge sorting and binary search. The library is based on the Java NIO and Kotlin coroutines.
License: Apache License 2.0
Example:
class AutoCloseableSequenceImpl<X>(private val source: Iterator<X>): Sequence<X>, AutoCloseable {
override fun iterator(): Iterator<X> = source
override fun close() {
TODO("Not yet implemented")
}
}
fun <T, R> AutoCloseableSequenceImpl<T>.map(transform: (T) -> R): AutoCloseableSequenceImpl<R> {
val theSequence = this as Sequence<T>
return AutoCloseableSequenceImpl(theSequence.map(transform).iterator())
}Reproducer test can be found in a commit here https://github.com/so-dewy/textfile-utils
src/test/kotlin/MergeSortTest.kt add a new test: @Test
fun `test sort oom`(@TempDir dir: Path) {
testDefaultSortResourceFile(dir, "/oom.nt")
}
/src/test/resources add file oom.nt.tar.gzStacktrace:
org.gradle.api.internal.tasks.testing.TestSuiteExecutionException: Could not complete execution for Gradle Test Executor 5.
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:64)
at [email protected]/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at [email protected]/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at [email protected]/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at [email protected]/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.stop(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: java.lang.OutOfMemoryError: Java heap space
at java.base/java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:270)
at java.base/java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:254)
at cc.datafabric.textfileutils.files.AsyncLineReader.<init>(LineReader.kt:325)
at cc.datafabric.textfileutils.files.LineReaderKt.asyncReadByteLines(LineReader.kt:204)
at cc.datafabric.textfileutils.files.LineReaderKt.readLines(LineReader.kt:148)
at cc.datafabric.textfileutils.files.LineReaderKt.readLines$default(LineReader.kt:97)
at cc.datafabric.textfileutils.files.FileMergeKt$mergeFilesInverse$10$1.invoke(FileMerge.kt:234)
at cc.datafabric.textfileutils.files.FileMergeKt$mergeFilesInverse$10$1.invoke(FileMerge.kt:228)
at cc.datafabric.textfileutils.files.FilesKt.use(Files.kt:245)
at cc.datafabric.textfileutils.files.FilesKt.use$default(Files.kt:236)
at cc.datafabric.textfileutils.files.FileMergeKt$mergeFilesInverse$10.invoke(FileMerge.kt:228)
at cc.datafabric.textfileutils.files.FileMergeKt$mergeFilesInverse$10.invoke(FileMerge.kt:227)
at cc.datafabric.textfileutils.files.FilesKt.use(Files.kt:229)
at cc.datafabric.textfileutils.files.FilesKt.use$default(Files.kt:223)
at cc.datafabric.textfileutils.files.FileMergeKt.mergeFilesInverse(FileMerge.kt:227)
at cc.datafabric.textfileutils.files.FileMergeKt.mergeFilesInverse(FileMerge.kt:126)
at cc.datafabric.textfileutils.files.FileMergeKt.mergeFilesInverse$default(FileMerge.kt:100)
at cc.datafabric.textfileutils.files.MergeSortKt.suspendSort(MergeSort.kt:304)
at cc.datafabric.textfileutils.files.MergeSortKt.suspendSort(MergeSort.kt:208)
at cc.datafabric.textfileutils.files.MergeSortKt$blockingSort$1.invokeSuspend(MergeSort.kt:118)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:115)
at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:103)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:793)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:697)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:684)
runBlocking inside runBlocking may lead to deadlock
This is an issue for the record and for historical purposes.
There was an epic discussion about the possibility of adding this functionality to commons-io.
Very funny reject resolution.
Looks suspicious, need review
https://github.com/DataFabricRus/textfile-utils/blob/main/src/main/kotlin/files/ByteArrays.kt#L174
if (!includeLeftBound && low == sourceStartInclusive) {
val endExclusive = (high - 1)
return Lines(startInclusive = -1, endExclusive = endExclusive, lines = emptyList())
}
if (!includeRightBound && high == sourceEndExclusive) {
// end
val startInclusive = low
return Lines(startInclusive = startInclusive, endExclusive = -1, lines = emptyList())
}
val insertPosition = high
return Lines(startInclusive = insertPosition, endExclusive = insertPosition, lines = emptyList())
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