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Fix Java SimpleApp spark application #18795

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Fix Java SimpleApp spark application #18795

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4af272d
Fix Java SimpleApp spark application
christiam Aug 1, 2017
7471781
Additional fixes for Java
christiam Aug 2, 2017
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3 changes: 2 additions & 1 deletion docs/quick-start.md
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Original file line number Diff line number Diff line change
Expand Up @@ -297,12 +297,13 @@ We'll create a very simple Spark application, `SimpleApp.java`:
{% highlight java %}
/* SimpleApp.java */
import org.apache.spark.sql.SparkSession;
import org.apache.spark.sql.Dataset;

public class SimpleApp {
public static void main(String[] args) {
String logFile = "YOUR_SPARK_HOME/README.md"; // Should be some file on your system
SparkSession spark = SparkSession.builder().appName("Simple Application").getOrCreate();
Dataset<String> logData = spark.read.textFile(logFile).cache();
Dataset<String> logData = spark.read().textFile(logFile).cache();

long numAs = logData.filter(s -> s.contains("a")).count();
long numBs = logData.filter(s -> s.contains("b")).count();
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6 changes: 3 additions & 3 deletions docs/structured-streaming-programming-guide.md
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Expand Up @@ -1041,8 +1041,8 @@ streamingDf.join(staticDf, "type", "right_join") // right outer join with a sta
<div data-lang="java" markdown="1">

{% highlight java %}
Dataset<Row> staticDf = spark.read. ...;
Dataset<Row> streamingDf = spark.readStream. ...;
Dataset<Row> staticDf = spark.read(). ...;
Dataset<Row> streamingDf = spark.readStream(). ...;
streamingDf.join(staticDf, "type"); // inner equi-join with a static DF
streamingDf.join(staticDf, "type", "right_join"); // right outer join with a static DF
{% endhighlight %}
Expand Down Expand Up @@ -1087,7 +1087,7 @@ streamingDf
<div data-lang="java" markdown="1">

{% highlight java %}
Dataset<Row> streamingDf = spark.readStream. ...; // columns: guid, eventTime, ...
Dataset<Row> streamingDf = spark.readStream(). ...; // columns: guid, eventTime, ...

// Without watermark using guid column
streamingDf.dropDuplicates("guid");
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