forked from GitHub-Mirror/riotX-android
62 lines
2.1 KiB
Kotlin
62 lines
2.1 KiB
Kotlin
/*
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* Copyright 2019 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package im.vector.matrix.android.internal.database
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import im.vector.matrix.android.internal.util.createBackgroundHandler
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import io.realm.*
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import java.util.concurrent.CountDownLatch
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import java.util.concurrent.TimeUnit
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import java.util.concurrent.atomic.AtomicReference
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class RealmQueryLatch<E : RealmObject>(private val realmConfiguration: RealmConfiguration,
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private val realmQueryBuilder: (Realm) -> RealmQuery<E>) {
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private companion object {
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val QUERY_LATCH_HANDLER = createBackgroundHandler("REALM_QUERY_LATCH")
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}
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@Throws(InterruptedException::class)
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fun await(timeout: Long, timeUnit: TimeUnit) {
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val realmRef = AtomicReference<Realm>()
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val latch = CountDownLatch(1)
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QUERY_LATCH_HANDLER.post {
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val realm = Realm.getInstance(realmConfiguration)
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realmRef.set(realm)
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val result = realmQueryBuilder(realm).findAllAsync()
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result.addChangeListener(object : RealmChangeListener<RealmResults<E>> {
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override fun onChange(t: RealmResults<E>) {
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if (t.isNotEmpty()) {
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result.removeChangeListener(this)
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latch.countDown()
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}
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}
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})
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}
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try {
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latch.await(timeout, timeUnit)
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} catch (exception: InterruptedException) {
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throw exception
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} finally {
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QUERY_LATCH_HANDLER.post {
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realmRef.getAndSet(null).close()
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}
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}
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}
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} |