cassandra java

cassandra/.gitignore

@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

cassandra/pom.xml

@@ -0,0 +1,32 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>de.hsma</groupId>
+    <artifactId>cassandra</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>cassandra</name>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>11</maven.compiler.source>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.cassandra</groupId>
+            <artifactId>java-driver-core</artifactId>
+            <version>4.18.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.9.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

cassandra/src/main/java/org/example/QueryApp.java

@@ -0,0 +1,30 @@
+package org.example;
+
+import com.datastax.oss.driver.api.core.CqlSession;
+import com.datastax.oss.driver.api.core.cql.ResultSet;
+import com.datastax.oss.driver.api.core.cql.Row;
+
+import java.net.InetSocketAddress;
+
+public class QueryApp {
+
+    /**
+     *
+     * @param args
+     *
+     * @see <a href="https://github.com/datastax/java-driver/tree/4.x/manual/core">Manual</a>
+     */
+    public static void main(String[] args) {
+        try (CqlSession session = CqlSession.builder()
+                .addContactPoint(new InetSocketAddress("localhost", 9042)) // = CqlSession.builder().build()
+                .withLocalDatacenter("datacenter1") // benötigt wenn contact point explizit angegeben
+                .withKeyspace("test") // unser keyspace (z.B. use test;)
+                .build()) {
+            ResultSet rs = session.execute("select * from professoren");
+            for (Row row : rs) {
+                System.out.println(row.getString("name"));
+                //System.out.println(row.getFormattedContents());
+            }
+        }
+    }
+}

mongodb/src/main/java/org/example/QueryApp.java

@@ -14,7 +14,7 @@ public class QueryApp {
         try (MongoClient mongoClient = MongoClients.create(uri)) {
             MongoDatabase database = mongoClient.getDatabase("hs"); // TODO database
             MongoCollection<Document> collection = database.getCollection("professoren"); // TODO collection
-            Document doc = collection.find(eq("Name", "Sokrates")).first();
+            Document doc = collection.find(eq("Name", "Curie")).first();
             if (doc != null) {
                 System.out.println(doc.toJson());
             } else {