io.vertx.serviceproxy.generator.ServiceProxyHandlerGen Maven / Gradle / Ivy
package io.vertx.serviceproxy.generator;
import io.vertx.codegen.Generator;
import io.vertx.codegen.ParamInfo;
import io.vertx.codegen.annotations.ModuleGen;
import io.vertx.codegen.annotations.ProxyGen;
import io.vertx.codegen.type.*;
import io.vertx.codegen.writer.CodeWriter;
import io.vertx.serviceproxy.generator.model.ProxyMethodInfo;
import io.vertx.serviceproxy.generator.model.ProxyModel;
import java.io.StringWriter;
import java.lang.annotation.Annotation;
import java.util.*;
import java.util.AbstractMap.SimpleEntry;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* @author Francesco Guardiani @slinkydeveloper
*/
public class ServiceProxyHandlerGen extends Generator {
public final GeneratorUtils utils;
public final static Map numericMapping = new HashMap<>();
static {
numericMapping.put("byte", "byte");
numericMapping.put("java.lang.Byte", "byte");
numericMapping.put("short", "short");
numericMapping.put("java.lang.Short", "short");
numericMapping.put("int", "int");
numericMapping.put("java.lang.Integer", "int");
numericMapping.put("long", "long");
numericMapping.put("java.lang.Long", "long");
numericMapping.put("float", "float");
numericMapping.put("java.lang.Float", "float");
numericMapping.put("double", "double");
numericMapping.put("java.lang.Double", "double");
}
public ServiceProxyHandlerGen(GeneratorUtils utils) {
kinds = Collections.singleton("proxy");
name = "service_proxy_handler";
this.utils = utils;
}
@Override
public Collection> annotations() {
return Arrays.asList(ProxyGen.class, ModuleGen.class);
}
@Override
public String filename(ProxyModel model) {
return model.getIfacePackageName() + "." + className(model) + ".java";
}
public String className(ProxyModel model) {
return model.getIfaceSimpleName() + "VertxProxyHandler";
}
public Stream additionalImports(ProxyModel model) {
return model.getImportedTypes()
.stream()
.filter(c -> !c.getPackageName().equals("java.lang"))
.map(ClassTypeInfo::toString);
}
@Override
public String render(ProxyModel model, int index, int size, Map session) {
StringWriter buffer = new StringWriter();
CodeWriter writer = new CodeWriter(buffer);
String className = className(model);
utils.classHeader(writer);
writer.stmt("package " + model.getIfacePackageName());
writer.newLine();
utils.writeImport(writer, model.getIfaceFQCN());
utils.handlerGenImports(writer);
additionalImports(model).forEach(i -> utils.writeImport(writer, i));
utils.roger(writer);
writer
.code("@SuppressWarnings({\"unchecked\", \"rawtypes\"})\n")
.code("public class " + className + " extends ProxyHandler {\n")
.newLine()
.indent()
.code("public static final long DEFAULT_CONNECTION_TIMEOUT = 5 * 60; // 5 minutes \n")
.stmt("private final Vertx vertx")
.stmt("private final " + model.getIfaceSimpleName() + " service")
.stmt("private final long timerID")
.stmt("private long lastAccessed")
.stmt("private final long timeoutSeconds")
.newLine()
.code("public " + className + "(Vertx vertx, " + model.getIfaceSimpleName() + " service){\n")
.indent()
.stmt("this(vertx, service, DEFAULT_CONNECTION_TIMEOUT)")
.unindent()
.code("}\n")
.newLine()
.code("public "+ className + "(Vertx vertx, " + model.getIfaceSimpleName() + " service, long timeoutInSecond){\n")
.indent()
.stmt("this(vertx, service, true, timeoutInSecond)")
.unindent()
.code("}\n")
.newLine()
.code("public " + className + "(Vertx vertx, " + model.getIfaceSimpleName() + " service, boolean topLevel, long timeoutSeconds) {\n");
utils.handlerConstructorBody(writer);
writer.code("private void checkTimedOut(long id) {\n")
.indent()
.stmt("long now = System.nanoTime()")
.code("if (now - lastAccessed > timeoutSeconds * 1000000000) {\n")
.indent();
model.getMethods().stream()
.filter(m -> ((ProxyMethodInfo)m).isProxyClose())
.forEach(m -> {
if (m.getParams().isEmpty()) writer.stmt("service." + m.getName() + "()");
else writer.stmt("service." + m.getName() + "(done -> {})");
});
writer
.stmt("close()")
.unindent()
.code("}\n")
.unindent()
.code("}\n")
.newLine();
utils.handleCloseAccessed(writer);
writer.code("public void handle(Message msg) {\n")
.indent()
.code("try{\n")
.indent()
.stmt("JsonObject json = msg.body()")
.stmt("String action = msg.headers().get(\"action\")")
.stmt("if (action == null) throw new IllegalStateException(\"action not specified\")")
.stmt("accessed()")
.code("switch (action) {\n")
.indent();
model.getMethods().stream().filter(m -> !m.isStaticMethod()).forEach(m -> generateActionSwitchEntry((ProxyMethodInfo) m, writer));
writer
.code("default: throw new IllegalStateException(\"Invalid action: \" + action);\n")
.unindent()
.code("}\n")
.unindent()
.code("} catch (Throwable t) {\n")
.indent()
.stmt("msg.reply(new ServiceException(500, t.getMessage()))")
.stmt("throw t")
.unindent()
.code("}\n")
.unindent()
.code("}\n")
.unindent()
.code("}");
return buffer.toString();
}
public void generateActionSwitchEntry(ProxyMethodInfo m, CodeWriter writer) {
ParamInfo lastParam = !m.getParams().isEmpty() ? m.getParam(m.getParams().size() - 1) : null;
boolean hasResultHandler = utils.isResultHandler(lastParam);
writer
.code("case \"" + m.getName() + "\": {\n")
.indent()
.code("service." + m.getName() + "(")
.indent();
if (hasResultHandler) {
writer.writeSeq(
Stream.concat(
m.getParams().subList(0, m.getParams().size() - 1).stream().map(this::generateJsonParamExtract),
Stream.of(generateHandler(lastParam))
),
",\n" + writer.indentation()
);
} else {
writer.writeSeq(
m.getParams().stream().map(this::generateJsonParamExtract),
",\n" + writer.indentation()
);
}
writer.unindent();
writer.write(");\n");
if (m.isProxyClose()) writer.stmt("close()");
writer.stmt("break");
writer.unindent();
writer.code("}\n");
}
public String generateJsonParamExtract(ParamInfo param) {
String name = param.getName();
TypeInfo type = param.getType();
String typeName = type.getName();
if (typeName.equals("char") || typeName.equals("java.lang.Character"))
return "json.getInteger(\"" + name + "\") == null ? null : (char)(int)(json.getInteger(\"" + name + "\"))";
if (typeName.equals("byte") || typeName.equals("java.lang.Byte") ||
typeName.equals("short") || typeName.equals("java.lang.Short") ||
typeName.equals("int") || typeName.equals("java.lang.Integer") ||
typeName.equals("long") || typeName.equals("java.lang.Long"))
return "json.getValue(\"" + name + "\") == null ? null : (json.getLong(\"" + name + "\")." + numericMapping.get(typeName) + "Value())";
if (typeName.equals("float") || typeName.equals("java.lang.Float") ||
typeName.equals("double") || typeName.equals("java.lang.Double"))
return "json.getValue(\"" + name + "\") == null ? null : (json.getDouble(\"" + name + "\")." + numericMapping.get(typeName) + "Value())";
if (type.getKind() == ClassKind.ENUM)
return "json.getString(\"" + name + "\") == null ? null : " + param.getType().getName() + ".valueOf(json.getString(\"" + name + "\"))";
if (type.getKind() == ClassKind.LIST || type.getKind() == ClassKind.SET) {
String coll = type.getKind() == ClassKind.LIST ? "List" : "Set";
TypeInfo typeArg = ((ParameterizedTypeInfo)type).getArg(0);
if (typeArg.getKind() == ClassKind.DATA_OBJECT)
return "json.getJsonArray(\"" + name + "\").stream().map(o -> o == null ? null : new " + typeArg.getName() + "((JsonObject)o)).collect(Collectors.to" + coll + "())";
if (typeArg.getName().equals("java.lang.Byte") || typeArg.getName().equals("java.lang.Short") ||
typeArg.getName().equals("java.lang.Integer") || typeArg.getName().equals("java.lang.Long"))
return "json.getJsonArray(\"" + name + "\").stream().map(o -> ((Number)o)." + numericMapping.get(typeArg.getName()) + "Value()).collect(Collectors.to" + coll + "())";
return "HelperUtils.convert" + coll + "(json.getJsonArray(\"" + name + "\").getList())";
}
if (type.getKind() == ClassKind.MAP) {
TypeInfo typeArg = ((ParameterizedTypeInfo)type).getArg(1);
if (typeArg.getName().equals("java.lang.Byte") || typeArg.getName().equals("java.lang.Short") ||
typeArg.getName().equals("java.lang.Integer") || typeArg.getName().equals("java.lang.Long") ||
typeArg.getName().equals("java.lang.Float") || typeArg.getName().equals("java.lang.Double"))
return "json.getJsonObject(\"" + name + "\").getMap().entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, entry -> ((java.lang.Number)entry.getValue())." + numericMapping.get(typeArg.getName()) + "Value()))";
return "HelperUtils.convertMap(json.getJsonObject(\"" + name + "\").getMap())";
}
if (type.getKind() == ClassKind.DATA_OBJECT)
return "json.getJsonObject(\"" + name + "\") == null ? null : new " + type.getName() + "(json.getJsonObject(\"" + name + "\"))";
return "(" + type.getName() + ")json.getValue(\"" + name + "\")";
}
public String generateHandler(ParamInfo param) {
TypeInfo typeArg = ((ParameterizedTypeInfo)((ParameterizedTypeInfo)param.getType()).getArg(0)).getArg(0);
if (typeArg.getKind() == ClassKind.LIST || typeArg.getKind() == ClassKind.SET) {
String coll = typeArg.getKind() == ClassKind.LIST ? "List" : "Set";
TypeInfo innerTypeArg = ((ParameterizedTypeInfo)typeArg).getArg(0);
if (innerTypeArg.getName().equals("java.lang.Character"))
return "HelperUtils.create" + coll + "CharHandler(msg)";
if (innerTypeArg.getKind() == ClassKind.DATA_OBJECT)
return "res -> {\n" +
" if (res.failed()) {\n" +
" if (res.cause() instanceof ServiceException) {\n" +
" msg.reply(res.cause());\n" +
" } else {\n" +
" msg.reply(new ServiceException(-1, res.cause().getMessage()));\n" +
" }\n" +
" } else {\n" +
" msg.reply(new JsonArray(res.result().stream().map(r -> r == null ? null : r.toJson()).collect(Collectors.toList())));\n" +
" }\n" +
" }";
return "HelperUtils.create" + coll + "Handler(msg)";
}
if (typeArg.getKind() == ClassKind.DATA_OBJECT)
return "res -> {\n" +
" if (res.failed()) {\n" +
" if (res.cause() instanceof ServiceException) {\n" +
" msg.reply(res.cause());\n" +
" } else {\n" +
" msg.reply(new ServiceException(-1, res.cause().getMessage()));\n" +
" }\n" +
" } else {\n" +
" msg.reply(res.result() == null ? null : res.result().toJson());\n" +
" }\n" +
" }";
if (typeArg.getKind() == ClassKind.API && ((ApiTypeInfo)typeArg).isProxyGen())
return "res -> {\n" +
" if (res.failed()) {\n" +
" if (res.cause() instanceof ServiceException) {\n" +
" msg.reply(res.cause());\n" +
" } else {\n" +
" msg.reply(new ServiceException(-1, res.cause().getMessage()));\n" +
" }\n" +
" } else {\n" +
" String proxyAddress = UUID.randomUUID().toString();\n" +
" new ServiceBinder(vertx).setAddress(proxyAddress).setTopLevel(false).setTimeoutSeconds(timeoutSeconds).register(" + typeArg.getSimpleName() + ".class, res.result());\n" +
" msg.reply(null, new DeliveryOptions().addHeader(\"proxyaddr\", proxyAddress));\n" +
" }\n" +
" }";
return "HelperUtils.createHandler(msg)";
}
}
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