Replace JavaVersion with Runtime.Version (#85361)

Since Java 9, the JDK has provided a means of parsing Java versions and
getting the current Java version. That class obviates the need for the
JavaVersion class of Elasticsearch. This commit removes the JavaVersion
class in favor of Runtime.Version.

Note that most of the changes here simply removed logic around
versioning because this change is intended only for the master branch,
where Java 17 is required.

Author: rjernst

libs/core/src/main/java/org/elasticsearch/jdk/JarHell.java

@@ -12,6 +12,7 @@
 import org.elasticsearch.core.SuppressForbidden;
 
 import java.io.IOException;
+import java.lang.Runtime.Version;
 import java.net.MalformedURLException;
 import java.net.URISyntaxException;
 import java.net.URL;
@@ -224,39 +225,19 @@ private static void checkManifest(Manifest manifest, Path jar) {
         // give a nice error if jar requires a newer java version
         String targetVersion = manifest.getMainAttributes().getValue("X-Compile-Target-JDK");
         if (targetVersion != null) {
-            checkVersionFormat(targetVersion);
             checkJavaVersion(jar.toString(), targetVersion);
         }
     }
 
-    public static void checkVersionFormat(String targetVersion) {
-        if (JavaVersion.isValid(targetVersion) == false) {
-            throw new IllegalStateException(
-                String.format(
-                    Locale.ROOT,
-                    "version string must be a sequence of nonnegative decimal integers separated by \".\"'s and may have "
-                        + "leading zeros but was %s",
-                    targetVersion
-                )
-            );
-        }
-    }
-
     /**
      * Checks that the java specification version {@code targetVersion}
      * required by {@code resource} is compatible with the current installation.
      */
     public static void checkJavaVersion(String resource, String targetVersion) {
-        JavaVersion version = JavaVersion.parse(targetVersion);
-        if (JavaVersion.current().compareTo(version) < 0) {
+        Version version = Version.parse(targetVersion);
+        if (Runtime.version().compareTo(version) < 0) {
             throw new IllegalStateException(
-                String.format(
-                    Locale.ROOT,
-                    "%s requires Java %s:, your system: %s",
-                    resource,
-                    targetVersion,
-                    JavaVersion.current().toString()
-                )
+                String.format(Locale.ROOT, "%s requires Java %s:, your system: %s", resource, targetVersion, Runtime.version().toString())
             );
         }
     }

libs/core/src/main/java/org/elasticsearch/jdk/JavaVersion.java

@@ -13,6 +13,7 @@
 import org.elasticsearch.test.ESTestCase;
 
 import java.io.IOException;
+import java.lang.Runtime.Version;
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -27,6 +28,9 @@
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
+
 public class JarHellTests extends ESTestCase {
 
     URL makeJar(Path dir, String name, Manifest manifest, String... files) throws IOException {
@@ -132,25 +136,21 @@ public void testXmlBeansLeniency() throws Exception {
 
     public void testRequiredJDKVersionTooOld() throws Exception {
         Path dir = createTempDir();
-        List<Integer> current = JavaVersion.current().getVersion();
+        List<Integer> current = Runtime.version().version();
         List<Integer> target = new ArrayList<>(current.size());
         for (int i = 0; i < current.size(); i++) {
             target.add(current.get(i) + 1);
         }
-        JavaVersion targetVersion = JavaVersion.parse(Strings.collectionToDelimitedString(target, "."));
+        Version targetVersion = Version.parse(Strings.collectionToDelimitedString(target, "."));
 
         Manifest manifest = new Manifest();
         Attributes attributes = manifest.getMainAttributes();
         attributes.put(Attributes.Name.MANIFEST_VERSION, "1.0.0");
         attributes.put(new Attributes.Name("X-Compile-Target-JDK"), targetVersion.toString());
         Set<URL> jars = Collections.singleton(makeJar(dir, "foo.jar", manifest, "Foo.class"));
-        try {
-            JarHell.checkJarHell(jars, logger::debug);
-            fail("did not get expected exception");
-        } catch (IllegalStateException e) {
-            assertTrue(e.getMessage().contains("requires Java " + targetVersion.toString()));
-            assertTrue(e.getMessage().contains("your system: " + JavaVersion.current().toString()));
-        }
+        var e = expectThrows(IllegalStateException.class, () -> JarHell.checkJarHell(jars, logger::debug));
+        assertThat(e.getMessage(), containsString("requires Java " + targetVersion));
+        assertThat(e.getMessage(), containsString("your system: " + Runtime.version().toString()));
     }
 
     public void testBadJDKVersionInJar() throws Exception {
@@ -160,18 +160,8 @@ public void testBadJDKVersionInJar() throws Exception {
         attributes.put(Attributes.Name.MANIFEST_VERSION, "1.0.0");
         attributes.put(new Attributes.Name("X-Compile-Target-JDK"), "bogus");
         Set<URL> jars = Collections.singleton(makeJar(dir, "foo.jar", manifest, "Foo.class"));
-        try {
-            JarHell.checkJarHell(jars, logger::debug);
-            fail("did not get expected exception");
-        } catch (IllegalStateException e) {
-            assertTrue(
-                e.getMessage()
-                    .equals(
-                        "version string must be a sequence of nonnegative decimal integers separated "
-                            + "by \".\"'s and may have leading zeros but was bogus"
-                    )
-            );
-        }
+        var e = expectThrows(IllegalArgumentException.class, () -> JarHell.checkJarHell(jars, logger::debug));
+        assertThat(e.getMessage(), equalTo("Invalid version string: 'bogus'"));
     }
 
     public void testRequiredJDKVersionIsOK() throws Exception {
@@ -184,24 +174,10 @@ public void testRequiredJDKVersionIsOK() throws Exception {
         JarHell.checkJarHell(jars, logger::debug);
     }
 
-    public void testValidVersions() {
-        String[] versions = new String[] { "1.7", "1.7.0", "0.1.7", "1.7.0.80" };
-        for (String version : versions) {
-            try {
-                JarHell.checkVersionFormat(version);
-            } catch (IllegalStateException e) {
-                fail(version + " should be accepted as a valid version format");
-            }
-        }
-    }
-
     public void testInvalidVersions() {
         String[] versions = new String[] { "", "1.7.0_80", "1.7." };
         for (String version : versions) {
-            try {
-                JarHell.checkVersionFormat(version);
-                fail("\"" + version + "\"" + " should be rejected as an invalid version format");
-            } catch (IllegalStateException e) {}
+            expectThrows(IllegalArgumentException.class, () -> JarHell.checkJavaVersion("foo", version));
         }
     }
 

libs/core/src/test/java/org/elasticsearch/jdk/JarHellTests.java

@@ -8,8 +8,6 @@
 
 package org.elasticsearch.common.ssl;
 
-import org.elasticsearch.jdk.JavaVersion;
-
 import java.nio.file.Path;
 import java.security.KeyStore;
 import java.util.Arrays;
@@ -66,48 +64,6 @@ public abstract class SslConfigurationLoader {
             : Arrays.asList("TLSv1.2", "TLSv1.1")
     );
 
-    private static final List<String> JDK11_CIPHERS = List.of(
-        // TLSv1.3 cipher has PFS, AEAD, hardware support
-        "TLS_AES_256_GCM_SHA384",
-        "TLS_AES_128_GCM_SHA256",
-
-        // PFS, AEAD, hardware support
-        "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
-        "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
-
-        // PFS, AEAD, hardware support
-        "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
-        "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
-
-        // PFS, hardware support
-        "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384",
-        "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
-
-        // PFS, hardware support
-        "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384",
-        "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256",
-
-        // PFS, hardware support
-        "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
-        "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
-
-        // PFS, hardware support
-        "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
-        "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
-
-        // AEAD, hardware support
-        "TLS_RSA_WITH_AES_256_GCM_SHA384",
-        "TLS_RSA_WITH_AES_128_GCM_SHA256",
-
-        // hardware support
-        "TLS_RSA_WITH_AES_256_CBC_SHA256",
-        "TLS_RSA_WITH_AES_128_CBC_SHA256",
-
-        // hardware support
-        "TLS_RSA_WITH_AES_256_CBC_SHA",
-        "TLS_RSA_WITH_AES_128_CBC_SHA"
-    );
-
     private static final List<String> JDK12_CIPHERS = List.of(
         // TLSv1.3 cipher has PFS, AEAD, hardware support
         "TLS_AES_256_GCM_SHA384",
@@ -157,9 +113,7 @@ public abstract class SslConfigurationLoader {
         "TLS_RSA_WITH_AES_128_CBC_SHA"
     );
 
-    static final List<String> DEFAULT_CIPHERS = JavaVersion.current().compareTo(JavaVersion.parse("12")) > -1
-        ? JDK12_CIPHERS
-        : JDK11_CIPHERS;
+    static final List<String> DEFAULT_CIPHERS = JDK12_CIPHERS;
     private static final char[] EMPTY_PASSWORD = new char[0];
 
     private final String settingPrefix;

libs/ssl-config/src/main/java/org/elasticsearch/common/ssl/SslConfigurationLoader.java

@@ -11,7 +11,6 @@
 import org.elasticsearch.common.settings.MockSecureSettings;
 import org.elasticsearch.common.settings.SecureString;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.jdk.JavaVersion;
 import org.elasticsearch.test.ESTestCase;
 
 import java.nio.file.Path;
@@ -27,7 +26,6 @@
 import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.not;
 import static org.hamcrest.Matchers.notNullValue;
 
 public class SslConfigurationLoaderTests extends ESTestCase {
@@ -223,16 +221,8 @@ public void testLoadKeysFromJKS() {
     }
 
     public void testChaCha20InCiphersOnJdk12Plus() {
-        assumeTrue("Test is only valid on JDK 12+ JVM", JavaVersion.current().compareTo(JavaVersion.parse("12")) > -1);
         assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, hasItem("TLS_CHACHA20_POLY1305_SHA256"));
         assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, hasItem("TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256"));
         assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, hasItem("TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"));
     }
-
-    public void testChaCha20NotInCiphersOnPreJdk12() {
-        assumeTrue("Test is only valid on pre JDK 12 JVM", JavaVersion.current().compareTo(JavaVersion.parse("12")) < 0);
-        assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, not(hasItem("TLS_CHACHA20_POLY1305_SHA256")));
-        assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, not(hasItem("TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256")));
-        assertThat(SslConfigurationLoader.DEFAULT_CIPHERS, not(hasItem("TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256")));
-    }
 }

libs/ssl-config/src/test/java/org/elasticsearch/common/ssl/SslConfigurationLoaderTests.java

@@ -9,7 +9,6 @@
 package org.elasticsearch.painless;
 
 import org.apache.lucene.util.Constants;
-import org.elasticsearch.jdk.JavaVersion;
 import org.hamcrest.Matcher;
 
 import java.lang.invoke.MethodHandle;
@@ -31,11 +30,7 @@ protected String valueCtorCall(String valueType, int size) {
 
     @Override
     protected Matcher<String> outOfBoundsExceptionMessageMatcher(int index, int size) {
-        if (JavaVersion.current().compareTo(JavaVersion.parse("11")) < 0) {
-            return equalTo(Integer.toString(index));
-        } else {
-            return equalTo("Index " + Integer.toString(index) + " out of bounds for length " + Integer.toString(size));
-        }
+        return equalTo("Index " + Integer.toString(index) + " out of bounds for length " + Integer.toString(size));
     }
 
     public void testArrayLengthHelper() throws Throwable {