roastedroot · chirino · Mar 21, 2025 · Mar 21, 2025
diff --git a/proxy-wasm-java-host/src/main/java/io/roastedroot/proxywasm/ProxyWasm.java b/proxy-wasm-java-host/src/main/java/io/roastedroot/proxywasm/ProxyWasm.java
@@ -13,7 +13,6 @@
 import com.dylibso.chicory.wasm.types.MemoryLimits;
 import com.dylibso.chicory.wasm.types.ValueType;
 import java.io.Closeable;
-import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -24,8 +23,6 @@ public final class ProxyWasm implements Closeable {
 
     private final ABI abi;
     private final Handler pluginHandler;
-    private final byte[] pluginConfig;
-    private final byte[] vmConfig;
     private final WasiPreview1 wasi;
 
     private final AtomicInteger nextContextID = new AtomicInteger(1);
@@ -38,8 +35,6 @@ public final class ProxyWasm implements Closeable {
     private byte[] httpCallResponseBody;
 
     private ProxyWasm(Builder other) throws StartException {
-        this.vmConfig = other.vmConfig;
-        this.pluginConfig = other.pluginConfig;
         this.pluginHandler = Objects.requireNonNullElse(other.pluginHandler, new Handler() {});
         this.wasi = other.wasi;
         this.abi = other.abi;
@@ -64,10 +59,14 @@ public void start() throws StartException {
 
         this.pluginContext = new PluginContext(this, pluginHandler);
         registerContext(pluginContext, 0);
-        if (!this.abi.proxyOnVmStart(pluginContext.id(), vmConfig.length)) {
+
+        byte[] vmConfig = this.pluginHandler.getVmConfig();
+        if (!this.abi.proxyOnVmStart(pluginContext.id(), len(vmConfig))) {
             throw new StartException("proxy_on_vm_start failed");
         }
-        if (!this.abi.proxyOnConfigure(pluginContext.id(), pluginConfig.length)) {
+
+        byte[] pluginConfig = this.pluginHandler.getPluginConfig();
+        if (!this.abi.proxyOnConfigure(pluginContext.id(), len(pluginConfig))) {
             throw new StartException("proxy_on_configure failed");
         }
     }
@@ -87,16 +86,6 @@ protected Handler next() {
                 return activeContext.handler();
             }
 
-            @Override
-            public byte[] getVmConfig() {
-                return vmConfig;
-            }
-
-            @Override
-            public byte[] getPluginConfig() {
-                return pluginConfig;
-            }
-
             @Override
             public WasmResult setEffectiveContextID(int contextID) {
                 Context context = contexts.get(contextID);
@@ -225,8 +214,6 @@ public static class Builder implements Cloneable {
         private final ABI abi = new ABI();
         private WasiPreview1 wasi;
 
-        private byte[] vmConfig = new byte[0];
-        private byte[] pluginConfig = new byte[0];
         private Handler pluginHandler;
         private ImportMemory memory;
         private WasiOptions wasiOptions;
@@ -251,26 +238,6 @@ public Builder withStart(boolean start) {
             return this;
         }
 
-        public ProxyWasm.Builder withVmConfig(byte[] vmConfig) {
-            this.vmConfig = vmConfig;
-            return this;
-        }
-
-        public ProxyWasm.Builder withVmConfig(String vmConfig) {
-            this.vmConfig = vmConfig.getBytes(StandardCharsets.UTF_8);
-            return this;
-        }
-
-        public ProxyWasm.Builder withPluginConfig(byte[] pluginConfig) {
-            this.pluginConfig = pluginConfig;
-            return this;
-        }
-
-        public ProxyWasm.Builder withPluginConfig(String pluginConfig) {
-            this.pluginConfig = pluginConfig.getBytes(StandardCharsets.UTF_8);
-            return this;
-        }
-
         public ProxyWasm.Builder withPluginHandler(Handler vmHandler) {
             this.pluginHandler = vmHandler;
             return this;

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/EchoHttpBodyTest.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/EchoHttpBodyTest.java
@@ -31,9 +31,9 @@ public class EchoHttpBodyTest {
     @BeforeEach
     void setUp() throws StartException {
         this.handler = new MockHandler();
-        ProxyWasm.Builder builder = ProxyWasm.builder();
-        builder.withPluginConfig("echo");
-        this.proxyWasm = builder.build(module);
+        handler.setPluginConfig("echo");
+
+        this.proxyWasm = ProxyWasm.builder().withPluginHandler(handler).build(module);
         this.httpContext = proxyWasm.createHttpContext(handler);
     }
 

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/HttpHeadersTest.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/HttpHeadersTest.java
@@ -57,7 +57,8 @@ public void onHttpResponseHeaders() throws StartException {
         var config =
                 String.format(
                         "{\"header\": \"%s\", \"value\": \"%s\"}", "x-wasm-header", "x-value");
-        try (var proxyWasm = ProxyWasm.builder().withPluginConfig(config).build(module)) {
+        handler.setPluginConfig(config);
+        try (var proxyWasm = ProxyWasm.builder().withPluginHandler(handler).build(module)) {
             int id = 0;
             try (var host = proxyWasm.createHttpContext(handler)) {
                 id = host.id();
@@ -82,6 +83,8 @@ public void onHttpResponseHeaders() throws StartException {
             // Check logs
             handler.assertSortedLogsEqual(
                     String.format("%d finished", id),
+                    "loading plugin config",
+                    "header from config: x-wasm-header = x-value",
                     "response header <-- key2: value2",
                     "response header <-- key1: value1",
                     "adding header: x-wasm-header=x-value",

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/HttpRoutingTest.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/HttpRoutingTest.java
@@ -21,8 +21,8 @@ public class HttpRoutingTest {
     @Test
     public void canary() throws StartException {
         var handler = new MockHandler();
-        ProxyWasm.Builder builder =
-                ProxyWasm.builder().withPluginHandler(handler).withPluginConfig(new byte[] {2});
+        handler.setPluginConfig(new byte[] {2});
+        ProxyWasm.Builder builder = ProxyWasm.builder().withPluginHandler(handler);
         try (var host = builder.build(module)) {
             try (var context = host.createHttpContext(handler)) {
 
@@ -47,9 +47,9 @@ public void canary() throws StartException {
     @Test
     public void nonCanary() throws StartException {
         var handler = new MockHandler();
+        handler.setPluginConfig(new byte[] {1});
         var module = Parser.parse(Path.of("./src/test/go-examples/http_routing/main.wasm"));
-        ProxyWasm.Builder builder =
-                ProxyWasm.builder().withPluginHandler(handler).withPluginConfig(new byte[] {1});
+        ProxyWasm.Builder builder = ProxyWasm.builder().withPluginHandler(handler);
         try (var host = builder.build(module)) {
             try (var context = host.createHttpContext(handler)) {
 

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/JsonValidationTest.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/JsonValidationTest.java
@@ -147,7 +147,8 @@ class OnHttpRequestBody {
         @BeforeEach
         void setUp() throws StartException {
             var config = "{\"requiredKeys\": [\"my_key\"]}";
-            this.host = ProxyWasm.builder().withPluginConfig(config).build(module);
+            handler.setPluginConfig(config);
+            this.host = ProxyWasm.builder().withPluginHandler(handler).build(module);
             this.context = host.createHttpContext(handler);
         }
 

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/MockHandler.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/MockHandler.java
@@ -16,6 +16,7 @@
 import io.roastedroot.proxywasm.StreamType;
 import io.roastedroot.proxywasm.WasmException;
 import io.roastedroot.proxywasm.WasmResult;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -67,6 +68,8 @@ public HttpResponse(
     private byte[] downStreamData = new byte[0];
     private byte[] upstreamData = new byte[0];
     private byte[] grpcReceiveBuffer = new byte[0];
+    private byte[] vmConfig;
+    private byte[] pluginConfig;
 
     static final boolean DEBUG = "true".equals(System.getenv("DEBUG"));
 
@@ -119,6 +122,32 @@ public void assertLogsDoNotContain(String... message) {
         }
     }
 
+    @Override
+    public byte[] getVmConfig() {
+        return vmConfig;
+    }
+
+    public void setVmConfig(byte[] vmConfig) {
+        this.vmConfig = vmConfig;
+    }
+
+    public void setVmConfig(String vmConfig) {
+        this.vmConfig = vmConfig.getBytes(StandardCharsets.UTF_8);
+    }
+
+    @Override
+    public byte[] getPluginConfig() {
+        return pluginConfig;
+    }
+
+    public void setPluginConfig(byte[] pluginConfig) {
+        this.pluginConfig = pluginConfig;
+    }
+
+    public void setPluginConfig(String pluginConfig) {
+        this.pluginConfig = pluginConfig.getBytes(StandardCharsets.UTF_8);
+    }
+
     @Override
     public WasmResult setTickPeriodMilliseconds(int tickPeriodMilliseconds) {
         this.tickPeriodMilliseconds = tickPeriodMilliseconds;

diff --git a/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/SharedQueueTest.java b/proxy-wasm-java-host/src/test/java/io/roastedroot/proxywasm/examples/SharedQueueTest.java
@@ -57,12 +57,12 @@ public void testOnPluginStart() throws StartException, WasmException {
 
         // Create and configure the http_request_headers receiver instance
         var receiverHandler1 = new MockHandler(sharedData);
+        receiverHandler1.setPluginConfig("http_request_headers");
         receiverHandler1.setProperty(List.of("vm_id"), bytes(receiverVmId));
         var receiverHost1 =
                 deferClose(
                         ProxyWasm.builder()
                                 .withPluginHandler(receiverHandler1)
-                                .withPluginConfig("http_request_headers")
                                 .build(receiverModule));
 
         var requestHeadersQueueId =
@@ -76,12 +76,12 @@ public void testOnPluginStart() throws StartException, WasmException {
 
         // Create and configure the http_response_headers receiver instance
         var receiverHandler2 = new MockHandler(sharedData);
+        receiverHandler2.setPluginConfig("http_response_headers");
         receiverHandler2.setProperty(List.of("vm_id"), bytes(receiverVmId));
         var receiverHost2 =
                 deferClose(
                         ProxyWasm.builder()
                                 .withPluginHandler(receiverHandler2)
-                                .withPluginConfig("http_response_headers")
                                 .build(receiverModule));
 
         var responseHeadersQueueId =
@@ -97,14 +97,12 @@ public void testOnPluginStart() throws StartException, WasmException {
 
         // Create and configure the sender instance
         var senderHandler = new MockHandler(sharedData);
+        senderHandler.setPluginConfig("http");
         var senderVmId = "sender";
         senderHandler.setProperty(List.of("vm_id"), bytes(senderVmId));
         var senderHost =
                 deferClose(
-                        ProxyWasm.builder()
-                                .withPluginHandler(senderHandler)
-                                .withPluginConfig("http")
-                                .build(senderModule));
+                        ProxyWasm.builder().withPluginHandler(senderHandler).build(senderModule));
         senderHandler.assertLogsContain(
                 String.format("contextID=%d is configured for %s", senderHost.contextId(), "http"));
 

diff --git a/...-java-host/src/test/java/io/roastedroot/proxywasm/examples/VmPluginConfigurationTest.java b/...-java-host/src/test/java/io/roastedroot/proxywasm/examples/VmPluginConfigurationTest.java
@@ -22,12 +22,11 @@ public class VmPluginConfigurationTest {
     @Test
     public void test() throws StartException {
         var handler = new MockHandler();
+        handler.setPluginConfig("plugin_config");
+        handler.setVmConfig("vm_config");
+
         handler.setProperty(List.of("plugin_name"), bytes("vm_plugin_configuration"));
-        ProxyWasm.Builder builder =
-                ProxyWasm.builder()
-                        .withPluginConfig("plugin_config")
-                        .withVmConfig("vm_config")
-                        .withPluginHandler(handler);
+        ProxyWasm.Builder builder = ProxyWasm.builder().withPluginHandler(handler);
         try (var ignored = builder.build(module)) {
 
             assertEquals(

diff --git a/proxy-wasm-jaxrs/src/main/java/io/roastedroot/proxywasm/jaxrs/PluginHandler.java b/proxy-wasm-jaxrs/src/main/java/io/roastedroot/proxywasm/jaxrs/PluginHandler.java
@@ -48,6 +48,24 @@ public void close() {
         }
     }
 
+    // //////////////////////////////////////////////////////////////////////
+    // Plugin config
+    // //////////////////////////////////////////////////////////////////////
+
+    byte[] vmConfig;
+
+    @Override
+    public byte[] getVmConfig() {
+        return vmConfig;
+    }
+
+    byte[] pluginConfig;
+
+    @Override
+    public byte[] getPluginConfig() {
+        return pluginConfig;
+    }
+
     // //////////////////////////////////////////////////////////////////////
     // Properties
     // //////////////////////////////////////////////////////////////////////

diff --git a/proxy-wasm-jaxrs/src/main/java/io/roastedroot/proxywasm/jaxrs/WasmPlugin.java b/proxy-wasm-jaxrs/src/main/java/io/roastedroot/proxywasm/jaxrs/WasmPlugin.java
@@ -1,5 +1,7 @@
 package io.roastedroot.proxywasm.jaxrs;
 
+import static io.roastedroot.proxywasm.Helpers.bytes;
+
 import com.dylibso.chicory.runtime.ImportMemory;
 import com.dylibso.chicory.runtime.Instance;
 import com.dylibso.chicory.wasm.WasmModule;
@@ -101,22 +103,22 @@ public WasmPlugin.Builder withShared(boolean shared) {
         }
 
         public WasmPlugin.Builder withVmConfig(byte[] vmConfig) {
-            proxyWasmBuilder = proxyWasmBuilder.withVmConfig(vmConfig);
+            this.handler.vmConfig = vmConfig;
             return this;
         }
 
         public WasmPlugin.Builder withVmConfig(String vmConfig) {
-            proxyWasmBuilder = proxyWasmBuilder.withVmConfig(vmConfig);
+            this.handler.vmConfig = bytes(vmConfig);
             return this;
         }
 
         public WasmPlugin.Builder withPluginConfig(byte[] pluginConfig) {
-            proxyWasmBuilder = proxyWasmBuilder.withPluginConfig(pluginConfig);
+            this.handler.pluginConfig = pluginConfig;
             return this;
         }
 
         public WasmPlugin.Builder withPluginConfig(String pluginConfig) {
-            proxyWasmBuilder = proxyWasmBuilder.withPluginConfig(pluginConfig);
+            this.handler.pluginConfig = bytes(pluginConfig);
             return this;
         }