Revert removal of client side checks

README.md

@@ -83,17 +83,6 @@ In this release, support was added to
 
 For details on the other features, see the "Options" sections
 
-#### Version 2.16.12: Max Payload Check
-
-As of version 2.16.12, there is no longer client side checking
-1. that a message payload is less than the server configuration (Core and JetStream publishes)
-2. is less than the stream configuration (JetStream publishes)
-
-Please see unit test for examples of this behavior.
-`testMaxPayload` in [PublishTests.java](src/test/java/io/nats/client/PublishTests.java)
-and
-`testMaxPayloadJs` in [JetStreamPubTests.cs](src/test/java/io/nats/client/impl/JetStreamPubTests.java)
-
 #### Version 2.16.8: Websocket Support
 
 As of version 2.16.8 Websocket (`ws` and `wss`) protocols are supported for connecting to the server.
@@ -247,6 +236,7 @@ When options are built, the SSLContext will be accepted or created in the follow
 | io.nats.client.norandomize                   | Property used to configure noRandomize.                                                     |
 | io.nats.client.noResolveHostnames            | Property used to configure noResolveHostnames.                                              |
 | io.nats.client.reportNoResponders            | Property used to configure reportNoResponders.                                              |
+| io.nats.clientsidelimitchecks                | Property use to configure clientsidelimitchecks.                                            | 
 | io.nats.client.url                           | Property used to configure server.  The value can be a comma-separated list of server URLs. |
 | io.nats.client.servers                       | Property used to configure servers. The value can be a comma-separated list of server URLs. |
 | io.nats.client.password                      | Property used to configure userinfo password.                                               |

src/main/java/io/nats/client/Options.java

@@ -318,6 +318,10 @@ public class Options {
      * Property used to configure a builder from a Properties object. {@value}, see {@link Builder#reportNoResponders() reportNoResponders}.
      */
     public static final String PROP_REPORT_NO_RESPONDERS = PFX + "reportNoResponders";
+    /**
+     * Property used to configure a builder from a Properties object. {@value}, see {@link Builder#clientSideLimitChecks() clientSideLimitChecks}.
+     */
+    public static final String PROP_CLIENT_SIDE_LIMIT_CHECKS = PFX + "clientsidelimitchecks";
     /**
      * Property used to configure a builder from a Properties object. {@value},
      * see {@link Builder#servers(String[]) servers}. The value can be a comma-separated list of server URLs.
@@ -423,12 +427,6 @@ public class Options {
      * Property used to set the path to a credentials file to be used in a FileAuthHandler
      */
     public static final String PROP_CREDENTIAL_PATH = PFX + "credential.path";
-    /**
-     * Property used to configure a builder from a Properties object. {@value}, see {@link Builder#clientSideLimitChecks() clientSideLimitChecks}.
-     * @deprecated Client Side Limit checks are no longer performed.
-     */
-    @Deprecated
-    public static final String PROP_CLIENT_SIDE_LIMIT_CHECKS = PFX + "clientsidelimitchecks";
     /**
      * This property is used to enable support for UTF8 subjects. See {@link Builder#supportUTF8Subjects() supportUTF8Subjects()}
      * @deprecated only plain ascii subjects are supported
@@ -557,6 +555,7 @@ public class Options {
     private final boolean noEcho;
     private final boolean noHeaders;
     private final boolean noNoResponders;
+    private final boolean clientSideLimitChecks;
     private final int maxMessagesInOutgoingQueue;
     private final boolean discardMessagesWhenOutgoingQueueFull;
     private final boolean ignoreDiscoveredServers;
@@ -661,6 +660,7 @@ public static class Builder {
         private boolean noEcho = false;
         private boolean noHeaders = false;
         private boolean noNoResponders = false;
+        private boolean clientSideLimitChecks = true;
         private String inboxPrefix = DEFAULT_INBOX_PREFIX;
         private int maxMessagesInOutgoingQueue = DEFAULT_MAX_MESSAGES_IN_OUTGOING_QUEUE;
         private boolean discardMessagesWhenOutgoingQueueFull = DEFAULT_DISCARD_MESSAGES_WHEN_OUTGOING_QUEUE_FULL;
@@ -762,6 +762,7 @@ public Builder properties(Properties props) {
             booleanProperty(props, PROP_NO_ECHO, b -> this.noEcho = b);
             booleanProperty(props, PROP_NO_HEADERS, b -> this.noHeaders = b);
             booleanProperty(props, PROP_NO_NORESPONDERS, b -> this.noNoResponders = b);
+            booleanProperty(props, PROP_CLIENT_SIDE_LIMIT_CHECKS, b -> this.clientSideLimitChecks = b);
             booleanProperty(props, PROP_PEDANTIC, b -> this.pedantic = b);
 
             intProperty(props, PROP_MAX_RECONNECT, DEFAULT_MAX_RECONNECT, i -> this.maxReconnect = i);
@@ -896,12 +897,12 @@ public Builder noNoResponders() {
         }
 
         /**
-         * @deprecated Client Side Limit checks are no longer performed.
+         * Set client side limit checks. Default is true
          * @param checks the checks flag
          * @return the Builder for chaining
          */
-        @Deprecated
         public Builder clientSideLimitChecks(boolean checks) {
+            this.clientSideLimitChecks = checks;
             return this;
         }
 
@@ -1602,6 +1603,7 @@ public Builder(Options o) {
             this.noEcho = o.noEcho;
             this.noHeaders = o.noHeaders;
             this.noNoResponders = o.noNoResponders;
+            this.clientSideLimitChecks = o.clientSideLimitChecks;
             this.inboxPrefix = o.inboxPrefix;
             this.traceConnection = o.traceConnection;
             this.maxMessagesInOutgoingQueue = o.maxMessagesInOutgoingQueue;
@@ -1661,6 +1663,7 @@ private Options(Builder b) {
         this.noEcho = b.noEcho;
         this.noHeaders = b.noHeaders;
         this.noNoResponders = b.noNoResponders;
+        this.clientSideLimitChecks = b.clientSideLimitChecks;
         this.inboxPrefix = b.inboxPrefix;
         this.traceConnection = b.traceConnection;
         this.maxMessagesInOutgoingQueue = b.maxMessagesInOutgoingQueue;
@@ -1840,12 +1843,10 @@ public boolean isNoNoResponders() {
     }
 
     /**
-     * @deprecated Client Side Limit checks are no longer performed.
      * @return clientSideLimitChecks flag
      */
-    @Deprecated
     public boolean clientSideLimitChecks() {
-        return false;
+        return clientSideLimitChecks;
     }
 
     /**

src/main/java/io/nats/client/impl/NatsConnection.java

@@ -822,6 +822,7 @@ public void publish(Message message) {
 
     void publishInternal(String subject, String replyTo, Headers headers, byte[] data) {
         checkIfNeedsHeaderSupport(headers);
+        checkPayloadSize(data);
 
         if (isClosed()) {
             throw new IllegalStateException("Connection is Closed");
@@ -847,6 +848,12 @@ private void checkIfNeedsHeaderSupport(Headers headers) {
         }
     }
 
+    private void checkPayloadSize(byte[] body) {
+        if (options.clientSideLimitChecks() && body != null && body.length > this.getMaxPayload() && this.getMaxPayload() > 0) {
+            throw new IllegalArgumentException(
+                "Message payload size exceed server configuration " + body.length + " vs " + this.getMaxPayload());
+        }
+    }
     /**
      * {@inheritDoc}
      */
@@ -1120,6 +1127,8 @@ public CompletableFuture<Message> request(Message message) {
     }
 
     CompletableFuture<Message> requestFutureInternal(String subject, Headers headers, byte[] data, Duration futureTimeout, CancelAction cancelAction) {
+        checkPayloadSize(data);
+
         if (isClosed()) {
             throw new IllegalStateException("Connection is Closed");
         } else if (isDraining()) {

src/test/java/io/nats/client/OptionsTests.java

@@ -14,10 +14,7 @@
 package io.nats.client;
 
 import io.nats.client.ConnectionListener.Events;
-import io.nats.client.impl.DataPort;
-import io.nats.client.impl.ErrorListenerLoggerImpl;
-import io.nats.client.impl.TestHandler;
-import io.nats.client.impl.TestStatisticsCollector;
+import io.nats.client.impl.*;
 import io.nats.client.support.HttpRequest;
 import io.nats.client.support.NatsUri;
 import io.nats.client.utils.CloseOnUpgradeAttempt;
@@ -354,23 +351,35 @@ private static void _testPropertiesSSLOptions(Options o) {
     @SuppressWarnings("deprecation")
     @Test
     public void testDeprecated() {
-        // clientSideLimitChecks, supportUTF8Subjects are deprecated and always returns false
+        // supportUTF8Subjects are deprecated and always returns false
         Options o = new Options.Builder().build();
-        assertFalse(o.clientSideLimitChecks());
         assertFalse(o.supportUTF8Subjects());
 
-        o = new Options.Builder().clientSideLimitChecks(true).supportUTF8Subjects().build();
-        assertFalse(o.clientSideLimitChecks());
+        o = new Options.Builder().supportUTF8Subjects().build();
         assertFalse(o.supportUTF8Subjects());
 
         Properties props = new Properties();
-        props.setProperty(Options.PROP_CLIENT_SIDE_LIMIT_CHECKS, "true");
         props.setProperty(Options.PROP_UTF8_SUBJECTS, "true");
         o = new Options.Builder(props).build();
-        assertFalse(o.clientSideLimitChecks());
         assertFalse(o.supportUTF8Subjects());
     }
 
+    @Test
+    public void testBuilderCoverageOptions() {
+        Options o = new Options.Builder().build();
+        assertTrue(o.clientSideLimitChecks());
+        assertNull(o.getServerPool()); // there is a default provider
+
+        o = new Options.Builder().clientSideLimitChecks(true).build();
+        assertTrue(o.clientSideLimitChecks());
+        o = new Options.Builder()
+            .clientSideLimitChecks(false)
+            .serverPool(new NatsServerPool())
+            .build();
+        assertFalse(o.clientSideLimitChecks());
+        assertNotNull(o.getServerPool());
+    }
+
     @Test
     public void testProperties() throws Exception {
         Properties props = new Properties();
@@ -492,7 +501,7 @@ private static void _testPropertiesCoverageOptions(Options o) {
         assertNull(o.getSslContext());
         assertTrue(o.isNoHeaders());
         assertTrue(o.isNoNoResponders());
-        assertFalse(o.clientSideLimitChecks()); // clientSideLimitChecks is deprecated and always returns false
+        assertTrue(o.clientSideLimitChecks());
         assertTrue(o.isIgnoreDiscoveredServers());
         assertTrue(o.isNoResolveHostnames());
     }

src/test/java/io/nats/client/PublishTests.java

@@ -18,10 +18,12 @@
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
+import java.net.SocketException;
 import java.nio.charset.StandardCharsets;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 
 import static io.nats.client.support.NatsConstants.*;
@@ -64,6 +66,45 @@ public void testThrowsWithoutSubject() {
         });
     }
 
+    @Test
+    public void testThrowsIfTooBig() throws Exception {
+        try (NatsTestServer ts = new NatsTestServer("src/test/resources/max_payload.conf", false, false))
+        {
+            Connection nc = Nats.connect(ts.getURI());
+            assertSame(Connection.Status.CONNECTED, nc.getStatus(), "Connected Status");
+
+            byte[] body = new byte[1001];
+            assertThrows(IllegalArgumentException.class, () -> nc.publish("subject", null, null, body));
+            nc.close();
+
+            AtomicBoolean mpv = new AtomicBoolean(false);
+            AtomicBoolean se = new AtomicBoolean(false);
+            ErrorListener el = new ErrorListener() {
+                @Override
+                public void errorOccurred(Connection conn, String error) {
+                    mpv.set(error.contains("Maximum Payload Violation"));
+                }
+
+                @Override
+                public void exceptionOccurred(Connection conn, Exception exp) {
+                    se.set(exp instanceof SocketException);
+                }
+            };
+            Options options = Options.builder()
+                .server(ts.getURI())
+                .clientSideLimitChecks(false)
+                .errorListener(el)
+                .build();
+            Connection nc2 = Nats.connect(options);
+            assertSame(Connection.Status.CONNECTED, nc2.getStatus(), "Connected Status");
+            nc2.publish("subject", null, null, body);
+
+            sleep(100);
+            assertTrue(mpv.get());
+            assertTrue(se.get());
+        }
+    }
+
     @Test
     public void testThrowsIfheadersNotSupported() {
         assertThrows(IllegalArgumentException.class, () -> {

src/test/resources/max_payload.conf

@@ -0,0 +1 @@
+max_payload: 1000