{"id":22941,"date":"2025-10-26T11:28:42","date_gmt":"2025-10-26T10:28:42","guid":{"rendered":"http:\/\/blog.wenzlaff.de\/?p=22941"},"modified":"2025-11-01T19:49:55","modified_gmt":"2025-11-01T18:49:55","slug":"1-stunde-gewonnen-beim-zeitumstellung-dann-mal-ein-rest-service-mit-quarkus-zu-ermittelung-der-tage-bis-zur-rente","status":"publish","type":"post","link":"http:\/\/blog.wenzlaff.de\/?p=22941","title":{"rendered":"1 Stunde gewonnen beim Zeitumstellung: dann mal ein REST-Service mit Quarkus zu Ermittelung der Tage bis zur Rente"},"content":{"rendered":"

Ein fokussiertes Mini\u2011Projekt f\u00fcr die umgestellte Stunde: ein Quarkus\u2011REST\u2011Service, der die verbleibenden Tage bis zur Rente liefert, lokal entwickeln und anschlie\u00dfend auf einem Raspberry Pi deployen.<\/p>\n

\"\"<\/p>\n

Idee und Ziel<\/p>\n

-Ein kleiner REST\u2011Endpunkt liefert JSON mit: verbleibenden Tagen<\/p>\n

– Projekt: Quarkus, Java 21, RESTEasy Reactive, Jackson. <\/p>\n

\"\"<\/p>\n

-Deployment: fast-jar mit quarkus-run.jar auf dem Raspberry Pi als systemd\u2011Service.<\/p>\n

Ok, start, zuerst den Java Endpunkt:<\/p>\n

package de.wenzlaff.twcount;\r\n\r\nimport java.time.LocalDate;\r\nimport java.time.temporal.ChronoUnit;\r\n\r\nimport jakarta.ws.rs.GET;\r\nimport jakarta.ws.rs.Path;\r\nimport jakarta.ws.rs.Produces;\r\nimport jakarta.ws.rs.core.MediaType;\r\n\r\n\/**\r\n * REST Endpunkt.\r\n * \r\n * @author Thomas Wenzlaff\r\n *\r\n *\/\r\n@Path(\"\/countdown\")\r\npublic class CountdownResource {\r\n\r\n\tprivate static final LocalDate TARGET_DATE = LocalDate.of(2027, 6, 1);\r\n\r\n\t@GET\r\n\t@Produces(MediaType.APPLICATION_JSON)\r\n\tpublic CountdownResponse getDaysCountdown() {\r\n\t\tLocalDate now = LocalDate.now();\r\n\t\tlong daysRemaining = ChronoUnit.DAYS.between(now, TARGET_DATE);\r\n\r\n\t\t\/\/ Falls das Ziel-Datum bereits vergangen ist, korrigiere auf 0\r\n\t\tif (daysRemaining < 0) {\r\n\t\t\tdaysRemaining = 0;\r\n\t\t}\r\n\r\n\t\treturn new CountdownResponse(daysRemaining);\r\n\t}\r\n}<\/pre>\n
Noch ein kleines BE:<\/p>\n
package de.wenzlaff.twcount;\r\n\r\n\/**\r\n * BE.\r\n * \r\n * @author Thomas Wenzlaff\r\n *\r\n *\/\r\npublic class CountdownResponse {\r\n\r\n\tprivate long daysRemaining;\r\n\r\n\tpublic CountdownResponse(long daysRemaining) {\r\n\t\tthis.daysRemaining = daysRemaining;\r\n\t}\r\n\r\n\tpublic long getDaysRemaining() {\r\n\t\treturn daysRemaining;\r\n\t}\r\n\r\n\tpublic void setDaysRemaining(long daysRemaining) {\r\n\t\tthis.daysRemaining = daysRemaining;\r\n\t}\r\n}\r\n<\/pre>\n
Die pom.xml ist auch nicht gro\u00df:<\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<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 https:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\r\n    <modelVersion>4.0.0<\/modelVersion>\r\n    <groupId>de.wenzlaff.twcount<\/groupId>\r\n    <artifactId>de.wenzlaff.twcount<\/artifactId>\r\n    <version>1.0.0<\/version>\r\n\r\n    <properties>\r\n        <compiler-plugin.version>3.14.0<\/compiler-plugin.version>\r\n        <maven.compiler.release>21<\/maven.compiler.release>\r\n        <project.build.sourceEncoding>UTF-8<\/project.build.sourceEncoding>\r\n        <project.reporting.outputEncoding>UTF-8<\/project.reporting.outputEncoding>\r\n        <quarkus.platform.artifact-id>quarkus-bom<\/quarkus.platform.artifact-id>\r\n        <quarkus.platform.group-id>io.quarkus.platform<\/quarkus.platform.group-id>\r\n        <quarkus.platform.version>3.28.5<\/quarkus.platform.version>\r\n        <skipITs>true<\/skipITs>\r\n        <surefire-plugin.version>3.5.4<\/surefire-plugin.version>\r\n    <\/properties>\r\n\r\n    <dependencyManagement>\r\n        <dependencies>\r\n            <dependency>\r\n                <groupId>${quarkus.platform.group-id}<\/groupId>\r\n                <artifactId>${quarkus.platform.artifact-id}<\/artifactId>\r\n                <version>${quarkus.platform.version}<\/version>\r\n                <type>pom<\/type>\r\n                <scope>import<\/scope>\r\n            <\/dependency>\r\n        <\/dependencies>\r\n    <\/dependencyManagement>\r\n    <dependencies>\r\n        <dependency>\r\n            <groupId>io.quarkus<\/groupId>\r\n            <artifactId>quarkus-rest<\/artifactId>\r\n        <\/dependency>    \r\n\t\t<dependency>\r\n\t\t    <groupId>io.quarkus<\/groupId>\r\n\t\t    <artifactId>quarkus-rest-jackson<\/artifactId>\t   \r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n            <groupId>io.quarkus<\/groupId>\r\n            <artifactId>quarkus-arc<\/artifactId>\r\n        <\/dependency>\r\n        \r\n        <dependency>  \r\n\t\t    <groupId>io.quarkus<\/groupId>  \r\n\t\t    <artifactId>quarkus-smallrye-openapi<\/artifactId>  \r\n\t\t<\/dependency>  \r\n\r\n        <dependency>\r\n            <groupId>io.quarkus<\/groupId>\r\n            <artifactId>quarkus-junit5<\/artifactId>\r\n            <scope>test<\/scope>\r\n        <\/dependency>\r\n        <dependency>\r\n            <groupId>io.rest-assured<\/groupId>\r\n            <artifactId>rest-assured<\/artifactId>\r\n            <scope>test<\/scope>\r\n        <\/dependency>\r\n        \r\n    <\/dependencies>\r\n\r\n    <build>\r\n        <plugins>\r\n            <plugin>\r\n                <groupId>${quarkus.platform.group-id}<\/groupId>\r\n                <artifactId>quarkus-maven-plugin<\/artifactId>\r\n                <version>${quarkus.platform.version}<\/version>\r\n                <extensions>true<\/extensions>\r\n                <executions>\r\n                    <execution>\r\n                        <goals>\r\n                            <goal>build<\/goal>\r\n                            <goal>generate-code<\/goal>\r\n                            <goal>generate-code-tests<\/goal>\r\n                            <goal>native-image-agent<\/goal>\r\n                        <\/goals>\r\n                    <\/execution>\r\n                <\/executions>\r\n            <\/plugin>\r\n            <plugin>\r\n                <artifactId>maven-compiler-plugin<\/artifactId>\r\n                <version>${compiler-plugin.version}<\/version>\r\n                <configuration>\r\n                    <parameters>true<\/parameters>\r\n                <\/configuration>\r\n            <\/plugin>\r\n            <plugin>\r\n                <artifactId>maven-surefire-plugin<\/artifactId>\r\n                <version>${surefire-plugin.version}<\/version>\r\n                <configuration>\r\n                    <argLine>--add-opens java.base\/java.lang=ALL-UNNAMED<\/argLine>\r\n                    <systemPropertyVariables>\r\n                        <java.util.logging.manager>org.jboss.logmanager.LogManager<\/java.util.logging.manager>\r\n                        <maven.home>${maven.home}<\/maven.home>\r\n                    <\/systemPropertyVariables>\r\n                <\/configuration>\r\n            <\/plugin>\r\n            <plugin>\r\n                <artifactId>maven-failsafe-plugin<\/artifactId>\r\n                <version>${surefire-plugin.version}<\/version>\r\n                <executions>\r\n                    <execution>\r\n                        <goals>\r\n                            <goal>integration-test<\/goal>\r\n                            <goal>verify<\/goal>\r\n                        <\/goals>\r\n                    <\/execution>\r\n                <\/executions>\r\n                <configuration>\r\n                    <argLine>--add-opens java.base\/java.lang=ALL-UNNAMED<\/argLine>\r\n                    <systemPropertyVariables>\r\n                        <native.image.path>${project.build.directory}\/${project.build.finalName}-runner<\/native.image.path>\r\n                        <java.util.logging.manager>org.jboss.logmanager.LogManager<\/java.util.logging.manager>\r\n                        <maven.home>${maven.home}<\/maven.home>\r\n                    <\/systemPropertyVariables>\r\n                <\/configuration>\r\n            <\/plugin>\r\n        <\/plugins>\r\n    <\/build>\r\n\r\n    <profiles>\r\n        <profile>\r\n            <id>native<\/id>\r\n            <activation>\r\n                <property>\r\n                    <name>native<\/name>\r\n                <\/property>\r\n            <\/activation>\r\n            <properties>\r\n                <quarkus.package.jar.enabled>false<\/quarkus.package.jar.enabled>\r\n                <skipITs>false<\/skipITs>\r\n                <quarkus.native.enabled>true<\/quarkus.native.enabled>\r\n            <\/properties>\r\n        <\/profile>\r\n    <\/profiles>\r\n<\/project>\r\n<\/pre>\n
So, nun noch ein JUnit Test, das muss sein:<\/p>\n
package de.wenzlaff.twcount;\r\n\r\nimport static org.junit.jupiter.api.Assertions.assertEquals;\r\n\r\nimport java.time.LocalDate;\r\nimport java.time.temporal.ChronoUnit;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport io.quarkus.test.common.http.TestHTTPEndpoint;\r\nimport io.quarkus.test.junit.QuarkusTest;\r\nimport io.restassured.RestAssured;\r\nimport io.restassured.http.ContentType;\r\n\r\n\/**\r\n * Test mit gleichen Erwartungswerten wie Ressource.\r\n * \r\n * @author Thomas Wenzlaff\r\n *\r\n *\/\r\n@QuarkusTest\r\n@TestHTTPEndpoint(CountdownResource.class)\r\nclass CountdownResourceTest {\r\n\r\n\t@Test\r\n\tvoid testCountdownEndpoint() {\r\n\r\n\t\tLocalDate now = LocalDate.now();\r\n\t\tlong targetDays = ChronoUnit.DAYS.between(now, LocalDate.of(2027, 6, 1));\r\n\t\tInteger expected = (int) Math.max(targetDays, 0);\r\n\r\n\t\tInteger actual = RestAssured.given().accept(ContentType.JSON).when().get() \/\/ Pfad kommt aus @TestHTTPEndpoint\r\n\t\t\t\t.then().statusCode(200).extract().path(\"daysRemaining\");\r\n\r\n\t\tassertEquals(expected, actual);\r\n\t}\r\n\r\n}<\/pre>\n
So es l\u00e4uft. Dann build und deploy:<\/p>\n
mvn clean package -Dquarkus.package.jar.type=fast-jar<\/strong><\/p>\n
# in das target\/quarkus-app Verzeichnis und alles auf den Pi kopieren
\n
\nscp -r quarkus-app pi@vier:\/home\/pi<\/strong><\/p>\n
Swagger UI l\u00e4uft auch mit: http:\/\/localhost:9009\/q\/swagger-ui\/<\/strong><\/p>\n
\"\"<\/p>\n
Dann noch ein system Service f\u00fcr den PI einfach diese Datei anlegen \/etc\/systemd\/system\/quarkus.service<\/p>\n
# \/etc\/systemd\/system\/quarkus.service\r\n[Unit]\r\nDescription=Quarkus Fast-JAR Service\r\nAfter=network-online.target\r\n\r\n[Service]\r\nUser=pi\r\nWorkingDirectory=\/home\/pi\/quarkus-app\r\nExecStart=\/usr\/bin\/java -Dquarkus.http.host=IP-ADRESSE -jar \/home\/pi\/quarkus-app\/quarkus-run.jar\r\nRestart=on-failure\r\nRestartSec=5\r\n\r\n[Install]\r\nWantedBy=multi-user.target<\/pre>\n
Und aktivieren:<\/p>\n
sudo systemctl enable  quarkus.service
\nsudo systemctl daemon-reload
\nsudo systemctl start quarkus<\/strong><\/p>\n
So, dann noch den Service in n8n<\/strong> aufrufen und an ntfy<\/strong> versenden, das ist aber in der einen Stunde nicht mehr m\u00f6glich. Aber nach GitLab<\/a> habe ich es dann doch noch mit Pipeline gebracht.<\/p>\n","protected":false},"excerpt":{"rendered":"
Ein fokussiertes Mini\u2011Projekt f\u00fcr die umgestellte Stunde: ein Quarkus\u2011REST\u2011Service, der die verbleibenden Tage bis zur Rente liefert, lokal entwickeln und anschlie\u00dfend auf einem Raspberry Pi deployen. Idee und Ziel -Ein kleiner REST\u2011Endpunkt liefert JSON mit: verbleibenden Tagen – Projekt: Quarkus, Java 21, RESTEasy Reactive, Jackson.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[220,6202,3163,1023],"tags":[4053,2178,6255,6256,6176,2487,760,6257],"class_list":["post-22941","post","type-post","status-publish","format-standard","hentry","category-anleitung","category-java-21-challenge","category-maven","category-raspberry-pi","tag-countdown","tag-java","tag-n8n","tag-ntfy","tag-rente","tag-rest","tag-scp","tag-zeitumstellung"],"_links":{"self":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts\/22941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22941"}],"version-history":[{"count":0,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=\/wp\/v2\/posts\/22941\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22941"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.wenzlaff.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}