Question

我正在尝试使用Scala API为MongoDB插入文档，但还没有运气。我正在使用API插入数据并从mongo shell中检查它。 Shell表示没有插入文档，但API在完成执行之前不会抛出任何错误。执行完成后，我收到了这个例外：

[cluster-ClusterId{value='n123b2h34vj23h4j2bk2jb34k', description='null'}-cluster0-shard-00-00.server.com:27017] INFO org.mongodb.driver.cluster - Exception in monitor thread while connecting to server cluster0-shard-00-00.server.com:27017
com.mongodb.MongoSocketReadException: Prematurely reached end of stream
    at com.mongodb.connection.AsynchronousSocketChannelStream$BasicCompletionHandler.completed(AsynchronousSocketChannelStream.java:215)
    at com.mongodb.connection.AsynchronousSocketChannelStream$BasicCompletionHandler.completed(AsynchronousSocketChannelStream.java:201)
    at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
    at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
    at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
    at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
    at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
    at com.mongodb.connection.AsynchronousSocketChannelStream$BasicCompletionHandler.completed(AsynchronousSocketChannelStream.java:220)
    at com.mongodb.connection.AsynchronousSocketChannelStream$BasicCompletionHandler.completed(AsynchronousSocketChannelStream.java:201)
    at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
    at sun.nio.ch.UnixAsynchronousSocketChannelImpl.finishRead(UnixAsynchronousSocketChannelImpl.java:430)
    at sun.nio.ch.UnixAsynchronousSocketChannelImpl.finish(UnixAsynchronousSocketChannelImpl.java:191)
    at sun.nio.ch.UnixAsynchronousSocketChannelImpl.onEvent(UnixAsynchronousSocketChannelImpl.java:213)
    at sun.nio.ch.KQueuePort$EventHandlerTask.run(KQueuePort.java:301)
    at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
    at sun.misc.InnocuousThread.run(InnocuousThread.java:74)

以下是我插入数据的代码段：

val mongoClient = MongoConfig.getMongoClient()
val mongoDatabase = MongoConfig.getMongoDb(mongoClient, "mydb")
val mongoCollection = mongoDatabase.getCollection("mycol")

val userDocument = Document(createBsonDocument(user))

val insertObservable = mongoCollection.insertOne(userDocument)

insertObservable.subscribe(new Observer[Completed] {
    override def onNext(result: Completed): Unit = println("Insert operation successful")
    override def onError(e: Throwable): Unit = println("Insert operation failed")
    override def onComplete(): Unit = println("Insert operation completed")
})

和DB连接的配置：包some.package

import com.mongodb.MongoCredential
import org.mongodb.scala.{MongoClient, MongoClientSettings, MongoDatabase, MongoCollection, ServerAddress}
import org.mongodb.scala.connection.ClusterSettings
import org.mongodb.scala.bson.collection.immutable.Document
import com.mongodb.{MongoSocketReadException, MongoSocketException}
import scala.collection.JavaConverters._

object MongoConfig {
    def setMongoClusterConfig(): ClusterSettings = {
        val mongoClusterSettings: ClusterSettings = ClusterSettings
            .builder
            .hosts(List(new ServerAddress("cluster0-shard-00-00.server.com:27017"), 
                        new ServerAddress("cluster0-shard-00-01.server.com:27017"),
                        new ServerAddress("cluster0-shard-00-02.server.com:27017"))
                   .asJava)
            .build

        mongoClusterSettings
    }

    def createMongoCredentials(mongoDbName: String = "mydb", 
                               mongoUsername: String = "username", 
                               mongoPassword: Array[Char] = "password".toCharArray): MongoCredential = {
        val mongoCredential: MongoCredential = MongoCredential
            .createCredential(mongoUsername, mongoDbName, mongoPassword)

        mongoCredential
    }

    @throws(classOf[MongoSocketReadException])
    @throws(classOf[MongoSocketException])
    def getMongoClient(mongoClusterSettings: ClusterSettings = setMongoClusterConfig(),
                       mongoCredential: MongoCredential = createMongoCredentials()): MongoClient = {
        val mongoClientSettings: MongoClientSettings = MongoClientSettings
            .builder
            .clusterSettings(mongoClusterSettings)
            .credentialList(List(mongoCredential).asJava)
            .build

        // System.setProperty("org.mongodb.async.type", "netty")

        MongoClient(mongoClientSettings)
    }

    def getMongoDb(mongoClient: MongoClient,
                   mongoDbName: String): MongoDatabase = {
        getMongoClient().getDatabase(mongoDbName)
    }
}

有什么想法吗？

无法使用scala API将文档插入mongodb

0 个答案: