Clean up some code quality issues in GCP proxy

All changes are suggested by IntelliJ code inspection.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=189586104

java/google/registry/proxy/CertificateModule.java

@@ -73,8 +73,8 @@ public class CertificateModule {
       ImmutableList<Object> objects, Class<T> clazz, Function<T, E> converter) {
     return objects
         .stream()
-        .filter(obj -> clazz.isInstance(obj))
-        .map(obj -> clazz.cast(obj))
+        .filter(clazz::isInstance)
+        .map(clazz::cast)
         .map(converter)
         .collect(toImmutableList());
   }

java/google/registry/proxy/EppProtocolModule.java

@@ -16,7 +16,6 @@ package google.registry.proxy;
 
 import static google.registry.util.ResourceUtils.readResourceBytes;
 
-import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableList;
 import dagger.Module;
 import dagger.Provides;
@@ -43,6 +42,7 @@ import io.netty.handler.timeout.ReadTimeoutHandler;
 import java.io.IOException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ScheduledExecutorService;
+import java.util.function.Supplier;
 import javax.inject.Named;
 import javax.inject.Provider;
 import javax.inject.Qualifier;
@@ -56,7 +56,7 @@ public class EppProtocolModule {
 
   /** Dagger qualifier to provide epp protocol related handlers and other bindings. */
   @Qualifier
-  public @interface EppProtocol {};
+  public @interface EppProtocol {}
 
   private static final String PROTOCOL_NAME = "epp";
 

java/google/registry/proxy/ProxyModule.java

@@ -26,8 +26,6 @@ import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
 import com.google.api.client.googleapis.util.Utils;
 import com.google.api.services.cloudkms.v1.CloudKMS;
 import com.google.api.services.cloudkms.v1.model.DecryptRequest;
-import com.google.common.base.Optional;
-import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
 import com.google.monitoring.metrics.MetricReporter;
@@ -48,10 +46,12 @@ import io.netty.handler.ssl.OpenSsl;
 import io.netty.handler.ssl.SslProvider;
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
+import java.util.function.Supplier;
 import java.util.logging.ConsoleHandler;
 import java.util.logging.Handler;
 import java.util.logging.Level;
@@ -96,9 +96,9 @@ public class ProxyModule {
   private void configureLogging() {
     // Remove all other handlers on the root logger to avoid double logging.
     Logger rootLogger = Logger.getLogger("");
-    Arrays.asList(rootLogger.getHandlers()).forEach(h -> rootLogger.removeHandler(h));
+    Arrays.asList(rootLogger.getHandlers()).forEach(rootLogger::removeHandler);
 
-    // If running on in a non-local environment, use GCP JSON formater.
+    // If running on in a non-local environment, use GCP JSON formatter.
     Handler rootHandler = new ConsoleHandler();
     rootHandler.setLevel(Level.FINE);
     if (env != Environment.LOCAL) {
@@ -129,19 +129,19 @@ public class ProxyModule {
   @Provides
   @WhoisProtocol
   int provideWhoisPort(ProxyConfig config) {
-    return Optional.fromNullable(whoisPort).or(config.whois.port);
+    return Optional.ofNullable(whoisPort).orElse(config.whois.port);
   }
 
   @Provides
   @EppProtocol
   int provideEppPort(ProxyConfig config) {
-    return Optional.fromNullable(eppPort).or(config.epp.port);
+    return Optional.ofNullable(eppPort).orElse(config.epp.port);
   }
 
   @Provides
   @HealthCheckProtocol
   int provideHealthCheckPort(ProxyConfig config) {
-    return Optional.fromNullable(healthCheckPort).or(config.healthCheck.port);
+    return Optional.ofNullable(healthCheckPort).orElse(config.healthCheck.port);
   }
 
   @Provides
@@ -295,7 +295,7 @@ public class ProxyModule {
 
     private final byte[] bytes;
 
-    static final PemBytes create(byte[] bytes) {
+    static PemBytes create(byte[] bytes) {
       return new PemBytes(bytes);
     }
 

java/google/registry/proxy/WhoisProtocolModule.java

@@ -14,7 +14,6 @@
 
 package google.registry.proxy;
 
-import com.google.common.base.Supplier;
 import com.google.common.collect.ImmutableList;
 import dagger.Module;
 import dagger.Provides;
@@ -36,6 +35,7 @@ import io.netty.handler.codec.LineBasedFrameDecoder;
 import io.netty.handler.timeout.ReadTimeoutHandler;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ScheduledExecutorService;
+import java.util.function.Supplier;
 import javax.inject.Named;
 import javax.inject.Provider;
 import javax.inject.Qualifier;
@@ -47,7 +47,7 @@ public class WhoisProtocolModule {
 
   /** Dagger qualifier to provide whois protocol related handlers and other bindings. */
   @Qualifier
-  public @interface WhoisProtocol {};
+  public @interface WhoisProtocol {}
 
   private static final String PROTOCOL_NAME = "whois";
 

java/google/registry/proxy/handler/EppServiceHandler.java

@@ -20,7 +20,6 @@ import static google.registry.proxy.handler.ProxyProtocolHandler.REMOTE_ADDRESS_
 import static google.registry.proxy.handler.SslServerInitializer.CLIENT_CERTIFICATE_PROMISE_KEY;
 import static google.registry.util.X509Utils.getCertificateHash;
 
-import com.google.common.base.Supplier;
 import google.registry.proxy.metric.FrontendMetrics;
 import google.registry.util.FormattingLogger;
 import io.netty.buffer.ByteBuf;
@@ -36,6 +35,7 @@ import io.netty.handler.ssl.SslHandshakeCompletionEvent;
 import io.netty.util.AttributeKey;
 import io.netty.util.concurrent.Promise;
 import java.security.cert.X509Certificate;
+import java.util.function.Supplier;
 
 /** Handler that processes EPP protocol logic. */
 public class EppServiceHandler extends HttpsRelayServiceHandler {

java/google/registry/proxy/handler/HttpsRelayServiceHandler.java

@@ -17,7 +17,6 @@ package google.registry.proxy.handler;
 import static com.google.common.base.Preconditions.checkArgument;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
-import com.google.common.base.Supplier;
 import google.registry.proxy.metric.FrontendMetrics;
 import google.registry.util.FormattingLogger;
 import io.netty.buffer.ByteBuf;
@@ -38,6 +37,7 @@ import io.netty.handler.codec.http.cookie.Cookie;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Supplier;
 
 /**
  * Handler that relays a single (framed) ByteBuf message to an HTTPS server.

java/google/registry/proxy/handler/WhoisServiceHandler.java

@@ -14,13 +14,13 @@
 
 package google.registry.proxy.handler;
 
-import com.google.common.base.Supplier;
 import google.registry.proxy.metric.FrontendMetrics;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.http.FullHttpRequest;
 import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpHeaderValues;
+import java.util.function.Supplier;
 
 /** Handler that processes WHOIS protocol logic. */
 public final class WhoisServiceHandler extends HttpsRelayServiceHandler {

java/google/registry/proxy/metric/MetricParameters.java

@@ -78,7 +78,7 @@ public class MetricParameters {
     this(ImmutableMap.copyOf(System.getenv()), MetricParameters::gceConnectionFactory);
   }
 
-  private static final HttpURLConnection gceConnectionFactory(String path) {
+  private static HttpURLConnection gceConnectionFactory(String path) {
     String url = GCE_METADATA_URL_BASE + path;
     try {
       HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
@@ -91,7 +91,7 @@ public class MetricParameters {
       logger.warningfmt(e, "Incorrect GCE metadata server URL: %s", url);
       throw new RuntimeException(e);
     }
-  };
+  }
 
   private String readEnvVar(String envVar) {
     return envVarMap.getOrDefault(envVar, "");

javatests/google/registry/proxy/GcpJsonFormatterTest.java

@@ -37,16 +37,13 @@ public class GcpJsonFormatterTest {
   private final LogRecord logRecord = new LogRecord(Level.WARNING, MESSAGE);
 
   private static String makeJson(String severity, String source, String message) {
-    StringBuilder builder = new StringBuilder();
-    builder.append("{");
-    builder.append(
-        Joiner.on(",")
+    return "{"
+        + Joiner.on(",")
             .join(
                 makeJsonField("severity", severity),
                 makeJsonField("source", source),
-                makeJsonField("message", "\\n" + message)));
-    builder.append("}\n");
-    return builder.toString();
+                makeJsonField("message", "\\n" + message))
+        + "}\n";
   }
 
   private static String makeJsonField(String name, String content) {

javatests/google/registry/proxy/ProtocolModuleTest.java

@@ -18,7 +18,6 @@ import static com.google.common.collect.ImmutableList.toImmutableList;
 import static google.registry.proxy.ProxyConfig.Environment.TEST;
 import static google.registry.proxy.ProxyConfig.getProxyConfig;
 
-import com.google.common.base.Supplier;
 import com.google.common.base.Suppliers;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
@@ -55,6 +54,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.function.Consumer;
 import java.util.function.Function;
+import java.util.function.Supplier;
 import javax.inject.Named;
 import javax.inject.Provider;
 import javax.inject.Singleton;

javatests/google/registry/proxy/handler/ProxyProtocolHandlerTest.java

@@ -51,7 +51,7 @@ public class ProxyProtocolHandlerTest {
 
   @Test
   public void testSuccess_proxyHeaderMalformed_singleFrame() {
-    header = String.format("PROXY UNKNOWN\r\n");
+    header = "PROXY UNKNOWN\r\n";
     String message = "some message";
     // Header processed, rest of the message passed along.
     assertThat(channel.writeInbound(Unpooled.wrappedBuffer((header + message).getBytes(UTF_8))))

javatests/google/registry/proxy/metric/MetricParametersTest.java

@@ -62,8 +62,7 @@ public class MetricParametersTest {
           ZONE_PATH,
           zoneConnection);
   private final HashMap<String, String> fakeEnvVarMap = new HashMap<>();
-  private final Function<String, HttpURLConnection> fakeConnectionFactory =
-      path -> mockConnections.get(path);
+  private final Function<String, HttpURLConnection> fakeConnectionFactory = mockConnections::get;
 
   private final MetricParameters metricParameters =
       new MetricParameters(fakeEnvVarMap, fakeConnectionFactory);

javatests/google/registry/proxy/quota/QuotaManagerTest.java

@@ -46,7 +46,6 @@ public class QuotaManagerTest {
       new QuotaManager(tokenStore, MoreExecutors.newDirectExecutorService());
   private QuotaRequest request;
   private QuotaResponse response;
-  private QuotaRebate rebate;
 
   @Test
   public void testSuccess_requestApproved() {
@@ -74,7 +73,7 @@ public class QuotaManagerTest {
   public void testSuccess_rebate() throws Exception {
     DateTime grantedTokenRefillTime = clock.nowUtc();
     response = QuotaResponse.create(true, USER_ID, grantedTokenRefillTime);
-    rebate = QuotaRebate.create(response);
+    QuotaRebate rebate = QuotaRebate.create(response);
     Future<?> unusedFuture = quotaManager.releaseQuota(rebate);
     verify(tokenStore).scheduleRefresh();
     verify(tokenStore).put(USER_ID, grantedTokenRefillTime);