This commit is contained in:
crusader 2018-04-24 21:32:57 +09:00
parent 2b4aeea3e6
commit 8625e10e00
9 changed files with 255 additions and 341 deletions

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@ -1,12 +1,14 @@
package com.loafle.overflow.central.commons.service;
import com.loafle.overflow.core.exception.OverflowException;
public interface MessagePublisher {
void publishToDomainMembers(final long domainID, final String method, final Object... params);
void publishToDomainMembersByProbeKey(final String probeKey, final String method, final Object... params);
void publishToDomainMembers(final long domainID, final String method, final Object... params) throws OverflowException;
void publishToDomainMembersByProbeKey(final String probeKey, final String method, final Object... params) throws OverflowException;
void publishToMember(final String memberID, final String method, final Object... params);
void publishToMemberSession(final String memberSessionID, final String method, final Object... params);
void publishToMember(final String memberID, final String method, final Object... params) throws OverflowException;
void publishToMemberSession(final String memberSessionID, final String method, final Object... params) throws OverflowException;
void publishToNoAuthProbe(final String tempProbeKey, final String method, final Object... params);
void publishToProbe(final String probeKey, final String method, final Object... params);
void publishToNoAuthProbe(final String tempProbeKey, final String method, final Object... params) throws OverflowException;
void publishToProbe(final String probeKey, final String method, final Object... params) throws OverflowException;
}

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@ -35,85 +35,63 @@ public class CentralDiscoveryService implements DiscoveryService {
System.out.println("Start Discovery");
System.out.println(json);
// this.messagePublisher.publishToProbe("/auth", noAuthProbe.getTempProbeKey(), "NoAuthProbeService.acceptNoAuthProbe", probe.getProbeKey());
}
// public boolean testDiscovery(int types, String obj) {
// Domain domain = new Domain();
// domain.setId(1);
// // int typeInt = Integer.valueOf(types);
// switch (types) {
// case 1 :
// messagePublisher.publishToDomainMembers(domain, "DiscoveryService.discoveryIngHost", obj);
// break;
// case 2 :
// messagePublisher.publishToDomain("/webapp", domain, "DiscoveryService.discoveryIngPort", obj);
// break;
// case 3 :
// messagePublisher.publishToDomain("/webapp", domain, "DiscoveryService.discoveryIngService", obj);
// break;
// }
// return true;
// }
}
@WebappAPI
public void discoverZone(String probeID, DiscoverZone discoveryZone) {
public void discoverZone(String probeID, DiscoverZone discoveryZone) throws OverflowException {
String requesterSessionID = SessionMetadata.getSessionID();
messagePublisher.publishToProbe(probeID, "DiscoveryService.DiscoverZone", requesterSessionID, discoveryZone);
}
@WebappAPI
public void discoverHost(String probeID, Zone zone, DiscoverHost discoveryHost) {
public void discoverHost(String probeID, Zone zone, DiscoverHost discoveryHost) throws OverflowException {
String requesterSessionID = SessionMetadata.getSessionID();
messagePublisher.publishToProbe(probeID, "DiscoveryService.DiscoverHost", requesterSessionID, zone, discoveryHost);
}
@WebappAPI
public void discoverPort(String probeID, Host host, DiscoverPort discoveryPort) {
public void discoverPort(String probeID, Host host, DiscoverPort discoveryPort) throws OverflowException {
String requesterSessionID = SessionMetadata.getSessionID();
messagePublisher.publishToProbe(probeID, "DiscoveryService.DiscoverPort", requesterSessionID, host, discoveryPort);
}
@WebappAPI
public void discoverService(String probeID, Port port, com.loafle.overflow.model.discovery.DiscoverService discoveryService) {
public void discoverService(String probeID, Port port, com.loafle.overflow.model.discovery.DiscoverService discoveryService) throws OverflowException {
String requesterSessionID = SessionMetadata.getSessionID();
messagePublisher.publishToProbe(probeID, "DiscoveryService.DiscoverService", requesterSessionID, port, discoveryService);
}
@ProbeAPI
public void discoverStart(String requesterSessionID, Date startDate) {
public void discoverStart(String requesterSessionID, Date startDate) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveryStart", startDate);
}
@ProbeAPI
public void discoverStop(String requesterSessionID, Date stopDate) {
public void discoverStop(String requesterSessionID, Date stopDate) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveryStop", stopDate);
}
@ProbeAPI
public void discoveredZone(String requesterSessionID, Zone zone) {
public void discoveredZone(String requesterSessionID, Zone zone) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveredZone", zone);
}
@ProbeAPI
public void discoveredHost(String requesterSessionID, Host host) {
public void discoveredHost(String requesterSessionID, Host host) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveredHost", host);
}
@ProbeAPI
public void discoveredPort(String requesterSessionID, Port port) {
public void discoveredPort(String requesterSessionID, Port port) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveredPort", port);
}
@ProbeAPI
public void discoveredService(String requesterSessionID, com.loafle.overflow.model.discovery.Service service) {
public void discoveredService(String requesterSessionID, com.loafle.overflow.model.discovery.Service service) throws OverflowException {
messagePublisher.publishToMemberSession(requesterSessionID, "DiscoveryService.discoveredService", service);
}

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@ -2,12 +2,8 @@ package com.loafle.overflow.central.proxy;
import com.google.gson.internal.Primitives;
import com.google.protobuf.ByteString;
import com.loafle.overflow.central.proxy.exception.InvalidParameterException;
import com.loafle.overflow.central.proxy.exception.InvalidRequestException;
import com.loafle.overflow.central.proxy.exception.NoSuchMethodException;
import com.loafle.overflow.central.proxy.exception.NoSuchServiceException;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import com.loafle.overflow.core.exception.OverflowException;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.type.JavaType;
@ -27,175 +23,177 @@ import java.util.Map;
*/
@Component
public class ServiceInvoker {
// @Autowired
private ApplicationContext context;
// @Autowired
private ApplicationContext context;
private ObjectMapper objectMapper;
private ObjectMapper objectMapper;
private Map<String, Cache> serviceCacheMap;
private Map<String, Cache> serviceCacheMap;
public ServiceInvoker(ApplicationContext context) {
this.context = context;
objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
public ServiceInvoker(ApplicationContext context) {
this.context = context;
objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
serviceCacheMap = new HashMap<>();
serviceCacheMap = new HashMap<>();
}
private static class Cache {
private ServiceCache serviceCache;
private Map<String, MethodCache> methodCacheMap;
private Cache(Object bean) {
serviceCache = new ServiceCache();
serviceCache.bean = bean;
methodCacheMap = new HashMap<>(10);
}
private static class Cache {
private ServiceCache serviceCache;
private Map<String, MethodCache> methodCacheMap;
private Cache(Object bean) {
serviceCache = new ServiceCache();
serviceCache.bean = bean;
methodCacheMap = new HashMap<>(10);
}
private Object getBean() {
return serviceCache.bean;
}
private MethodCache getMethodCache(String methodName) throws NoSuchMethodException {
MethodCache methodCache = methodCacheMap.get(methodName);
if (null != methodCache) {
return methodCache;
}
Method method = getMethod(methodName);
if (null == method) {
throw new NoSuchMethodException();
}
methodCache = new MethodCache();
methodCacheMap.put(methodName, methodCache);
methodCache.method = method;
methodCache.returnClazz = method.getReturnType();
int paramCount = method.getParameterCount();
if (0 == paramCount) {
return methodCache;
}
methodCache.parameterTypes = method.getGenericParameterTypes();
return methodCache;
}
private Method getMethod(String methodName) {
Class<?> clazz = AopUtils.getTargetClass(serviceCache.bean);
Method[] methods = clazz.getMethods();
Method targetMethod = null;
for(Method m : methods){
if (methodName.equals(m.getName())) {
targetMethod = m;
break;
}
}
return targetMethod;
}
private static class ServiceCache {
private Object bean;
private Map<String, MethodCache> methodCacheMap;
}
private static class MethodCache {
private Method method;
private Class returnClazz;
private Type[] parameterTypes;
}
private Object getBean() {
return serviceCache.bean;
}
private Cache getServiceCache(String serviceName) throws NoSuchServiceException {
Cache serviceCache = serviceCacheMap.get(serviceName);
if (null != serviceCache) {
return serviceCache;
}
try {
Object bean = context.getBean(serviceName);
serviceCache = new Cache(bean);
serviceCacheMap.put(serviceName, serviceCache);
} catch (BeansException e) {
throw new NoSuchServiceException();
}
private MethodCache getMethodCache(String methodName) throws NoSuchMethodException {
MethodCache methodCache = methodCacheMap.get(methodName);
if (null != methodCache) {
return methodCache;
}
return serviceCache;
Method method = getMethod(methodName);
if (null == method) {
throw new NoSuchMethodException();
}
methodCache = new MethodCache();
methodCacheMap.put(methodName, methodCache);
methodCache.method = method;
methodCache.returnClazz = method.getReturnType();
int paramCount = method.getParameterCount();
if (0 == paramCount) {
return methodCache;
}
methodCache.parameterTypes = method.getGenericParameterTypes();
return methodCache;
}
private Object getValue(Type parameterType, String json) throws InvalidParameterException {
JavaType targetType = objectMapper.getTypeFactory().constructType(parameterType);
if (!Primitives.isPrimitive(parameterType) && !parameterType.getTypeName().equals(String.class.getName())) {
try {
return objectMapper.readValue(json, targetType);
} catch (IOException e) {
throw new InvalidParameterException();
}
private Method getMethod(String methodName) {
Class<?> clazz = AopUtils.getTargetClass(serviceCache.bean);
Method[] methods = clazz.getMethods();
Method targetMethod = null;
for (Method m : methods) {
if (methodName.equals(m.getName())) {
targetMethod = m;
break;
}
return objectMapper.convertValue(json, targetType);
}
return targetMethod;
}
private Object[] getParameters(Type[] parameterTypes, List<ByteString> params) throws InvalidParameterException {
if (null == parameterTypes || null == params) {
return null;
}
if (parameterTypes.length != params.size()) {
throw new IllegalArgumentException();
}
Object[] result = new Object[parameterTypes.length];
for (int i = 0; i < parameterTypes.length; i++) {
result[i] = getValue(parameterTypes[i], params.get(i).toStringUtf8());
}
return result;
private static class ServiceCache {
private Object bean;
private Map<String, MethodCache> methodCacheMap;
}
public String invoke(String serviceName, String methodName, List<ByteString> params) throws OverflowException, OverflowRuntimeException {
Cache serviceCache = getServiceCache(serviceName);
Cache.MethodCache methodCache = serviceCache.getMethodCache(methodName);
if (null == methodCache.parameterTypes) {
if (null != params && 0 < params.size()) {
throw new InvalidParameterException();
}
} else {
if (methodCache.parameterTypes.length != params.size()) {
throw new InvalidParameterException();
}
}
Object[] parameters = null;
if (null != methodCache.parameterTypes && 0 < methodCache.parameterTypes.length) {
parameters = getParameters(methodCache.parameterTypes, params);
}
Object result = null;
String jsonInString = null;
try {
result = methodCache.method.invoke(serviceCache.getBean(), parameters);
} catch (IllegalAccessException e) {
throw new InvalidRequestException();
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof OverflowRuntimeException) {
throw (OverflowRuntimeException)t;
}
throw new InvalidRequestException();
}
try {
jsonInString = objectMapper.writeValueAsString(result);
} catch (IOException e) {
throw new InvalidRequestException();
}
return jsonInString;
private static class MethodCache {
private Method method;
private Class returnClazz;
private Type[] parameterTypes;
}
}
private Cache getServiceCache(String serviceName) throws java.lang.NoSuchMethodException {
Cache serviceCache = serviceCacheMap.get(serviceName);
if (null != serviceCache) {
return serviceCache;
}
try {
Object bean = context.getBean(serviceName);
serviceCache = new Cache(bean);
serviceCacheMap.put(serviceName, serviceCache);
} catch (BeansException e) {
throw new NoSuchMethodException();
}
return serviceCache;
}
private Object getValue(Type parameterType, String json) throws IllegalArgumentException {
JavaType targetType = objectMapper.getTypeFactory().constructType(parameterType);
if (!Primitives.isPrimitive(parameterType) && !parameterType.getTypeName().equals(String.class.getName())) {
try {
return objectMapper.readValue(json, targetType);
} catch (IOException e) {
throw new IllegalArgumentException("");
}
}
return objectMapper.convertValue(json, targetType);
}
private Object[] getParameters(Type[] parameterTypes, List<ByteString> params) throws IllegalArgumentException {
if (null == parameterTypes || null == params) {
return null;
}
if (parameterTypes.length != params.size()) {
throw new IllegalArgumentException();
}
Object[] result = new Object[parameterTypes.length];
for (int i = 0; i < parameterTypes.length; i++) {
result[i] = getValue(parameterTypes[i], params.get(i).toStringUtf8());
}
return result;
}
public String invoke(String serviceName, String methodName, List<ByteString> params)
throws NoSuchMethodException, IllegalAccessException, OverflowException {
Cache serviceCache = getServiceCache(serviceName);
Cache.MethodCache methodCache = serviceCache.getMethodCache(methodName);
if (null == methodCache.parameterTypes) {
if (null != params && 0 < params.size()) {
throw new IllegalArgumentException(
String.format("size of parameters is not valid target[%d], source[%d]", 0, params.size()));
}
} else {
if (methodCache.parameterTypes.length != params.size()) {
throw new IllegalArgumentException(String.format("size of parameters is not valid target[%d], source[%d]",
methodCache.parameterTypes.length, params.size()));
}
}
Object[] parameters = null;
if (null != methodCache.parameterTypes && 0 < methodCache.parameterTypes.length) {
parameters = getParameters(methodCache.parameterTypes, params);
}
Object result = null;
String jsonInString = null;
try {
result = methodCache.method.invoke(serviceCache.getBean(), parameters);
} catch (IllegalAccessException e) {
throw new IllegalAccessException(String.format("method[%s.%s] is not valid", serviceName, methodName));
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof OverflowException) {
throw (OverflowException) t;
}
throw new OverflowException("internal error", e);
}
try {
jsonInString = objectMapper.writeValueAsString(result);
} catch (IOException e) {
throw new OverflowException("internal error", e);
}
return jsonInString;
}
}

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@ -3,7 +3,11 @@ package com.loafle.overflow.central.proxy;
import com.loafle.overflow.api.OverflowApiServerGrpc;
import com.loafle.overflow.api.ServerInput;
import com.loafle.overflow.api.ServerOutput;
import com.loafle.overflow.core.exception.OverflowException;
import io.grpc.*;
import io.grpc.Status.Code;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
@ -14,91 +18,83 @@ import java.util.logging.Logger;
* Created by insanity on 17. 6. 28.
*/
public class ServiceProxy {
private static final Logger logger = Logger.getLogger(ServiceProxy.class.getName());
private static final Logger logger = Logger.getLogger(ServiceProxy.class.getName());
private io.grpc.Server server;
private ApplicationContext ctx;
private io.grpc.Server server;
private ApplicationContext ctx;
public void start(int port) throws IOException {
ctx = new AnnotationConfigApplicationContext("com.loafle.overflow");
public void start(int port) throws IOException {
ctx = new AnnotationConfigApplicationContext("com.loafle.overflow");
ProxyServerInterceptor proxyServerInterceptor = new ProxyServerInterceptor();
ProxyServerInterceptor proxyServerInterceptor = new ProxyServerInterceptor();
server = ServerBuilder.forPort(port)
.addService(ServerInterceptors.intercept(new ServiceImpl(new ServiceInvoker(ctx)), proxyServerInterceptor))
.build()
.start();
logger.info("Server started, listening on " + port);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
// Use stderr here since the logger may have been reset by its JVM shutdown hook.
System.err.println("*** shutting down gRPC server since JVM is shutting down");
ServiceProxy.this.stop();
System.err.println("*** server shut down");
}
});
server = ServerBuilder.forPort(port)
.addService(ServerInterceptors.intercept(new ServiceImpl(new ServiceInvoker(ctx)), proxyServerInterceptor))
.build().start();
logger.info("Server started, listening on " + port);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
// Use stderr here since the logger may have been reset by its JVM shutdown hook.
System.err.println("*** shutting down gRPC server since JVM is shutting down");
ServiceProxy.this.stop();
System.err.println("*** server shut down");
}
});
}
public void stop() {
if (server != null) {
server.shutdown();
}
}
public void blockUntilShutdown() throws InterruptedException {
if (server != null) {
server.awaitTermination();
}
}
static class ServiceImpl extends OverflowApiServerGrpc.OverflowApiServerImplBase {
private ServiceInvoker serviceInvoker;
ServiceImpl(ServiceInvoker serviceInvoker) {
this.serviceInvoker = serviceInvoker;
}
public void stop() {
if (server != null) {
server.shutdown();
}
@Override
public void exec(ServerInput request, io.grpc.stub.StreamObserver<ServerOutput> responseObserver) {
String result = null;
try {
result = this.serviceInvoker.invoke(request.getTarget(), request.getMethod(),
request.getParamsList().asByteStringList());
ServerOutput reply = ServerOutput.newBuilder().setResult(result).build();
responseObserver.onNext(reply);
responseObserver.onCompleted();
} catch (OverflowException e) {
responseObserver.onError(this.getException(request, Status.Code.INTERNAL, e));
return;
} catch (NoSuchMethodException e) {
responseObserver.onError(this.getException(request, Status.Code.NOT_FOUND, e));
return;
} catch (IllegalAccessException e) {
responseObserver.onError(this.getException(request, Status.Code.INVALID_ARGUMENT, e));
return;
}
}
public void blockUntilShutdown() throws InterruptedException {
if (server != null) {
server.awaitTermination();
}
}
static class ServiceImpl extends OverflowApiServerGrpc.OverflowApiServerImplBase {
private ServiceInvoker serviceInvoker;
ServiceImpl(ServiceInvoker serviceInvoker) {
this.serviceInvoker = serviceInvoker;
}
@Override
public void exec(ServerInput request,
io.grpc.stub.StreamObserver<ServerOutput> responseObserver) {
String result = null;
try {
result = this.serviceInvoker.invoke(request.getTarget(), request.getMethod(), request.getParamsList().asByteStringList());
ServerOutput reply = ServerOutput.newBuilder()
.setResult(result)
.build();
responseObserver.onNext(reply);
responseObserver.onCompleted();
} catch (OverflowException e) {
logger.warning(getExceptionMessage(request, e));
responseObserver.onError(convertException(e));
} catch (OverflowRuntimeException e) {
logger.warning(getExceptionMessage(request, e));
responseObserver.onError(convertException(e));
}
}
private String getExceptionMessage(ServerInput request, Exception e) {
return String.format("Target: %s, Method:%s, Params:%s, ex:%s", request.getTarget(), request.getMethod(), request.getParamsList().asByteStringList(), e.toString());
}
protected StatusRuntimeException convertException(OverflowRuntimeException e) {
String message = String.format("%s|%s", e.getClass().getSimpleName(), e.getMessage());
Status status = Status.fromCode(Status.Code.INTERNAL).withDescription(message);
return new StatusRuntimeException(status);
}
protected StatusException convertException(OverflowException e) {
String message = String.format("%s|%s", e.getClass().getSimpleName(), e.getMessage());
Status status = Status.fromCode(e.getCode()).withDescription(message);
return new StatusException(status);
}
private StatusException getException(ServerInput request, Code code, Throwable cause) {
String msg = String.format("Target: %s, Method:%s, Params:%s, message:%s", request.getTarget(),
request.getMethod(), request.getParamsList().asByteStringList(), cause.getMessage());
Status status = Status.fromCode(code).withDescription(msg).withCause(cause);
return new StatusException(status);
}
}
}

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@ -1,15 +0,0 @@
package com.loafle.overflow.central.proxy.exception;
import com.loafle.overflow.central.commons.exception.OverflowException;
import io.grpc.Status;
public class InvalidParameterException extends OverflowException {
private static final Status.Code code = Status.Code.INVALID_ARGUMENT;
public InvalidParameterException() {
super(code);
}
public InvalidParameterException(String message) {
super(code, message);
}
}

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@ -1,15 +0,0 @@
package com.loafle.overflow.central.proxy.exception;
import com.loafle.overflow.central.commons.exception.OverflowException;
import io.grpc.Status;
public class InvalidRequestException extends OverflowException {
private static final Status.Code code = Status.Code.UNKNOWN;
public InvalidRequestException() {
super(code);
}
public InvalidRequestException(String message) {
super(code, message);
}
}

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@ -1,15 +0,0 @@
package com.loafle.overflow.central.proxy.exception;
import com.loafle.overflow.central.commons.exception.OverflowException;
import io.grpc.Status;
public class NoSuchMethodException extends OverflowException {
private static final Status.Code code = Status.Code.UNIMPLEMENTED;
public NoSuchMethodException() {
super(code);
}
public NoSuchMethodException(String message) {
super(code, message);
}
}

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@ -1,15 +0,0 @@
package com.loafle.overflow.central.proxy.exception;
import com.loafle.overflow.central.commons.exception.OverflowException;
import io.grpc.Status;
public class NoSuchServiceException extends OverflowException {
private static final Status.Code code = Status.Code.UNIMPLEMENTED;
public NoSuchServiceException() {
super(code);
}
public NoSuchServiceException(String message) {
super(code, message);
}
}

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@ -41,40 +41,40 @@ public class RedisMessagePublisher implements MessagePublisher {
this.topics = topics;
}
public void publishToDomainMembers(final long domainID, final String method, final Object... params) {
public void publishToDomainMembers(final long domainID, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.MEMBER);
message.setTargets(getMemberListByDomainID(domainID));
this.publish(CHANNEL_WEBAPP, message, method, params);
}
public void publishToDomainMembersByProbeKey(final String probeKey, final String method, final Object... params) {
public void publishToDomainMembersByProbeKey(final String probeKey, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.MEMBER);
message.setTargets(getMemberListByProbeKey(probeKey));
this.publish(CHANNEL_WEBAPP, message, method, params);
}
public void publishToMember(final String memberID, final String method, final Object... params) {
public void publishToMember(final String memberID, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.MEMBER);
message.addTarget(memberID);
this.publish(CHANNEL_WEBAPP, message, method, params);
}
public void publishToMemberSession(final String memberSessionID, final String method, final Object... params) {
public void publishToMemberSession(final String memberSessionID, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.MEMBER_SESSION);
message.addTarget(memberSessionID);
this.publish(CHANNEL_WEBAPP, message, method, params);
}
public void publishToNoAuthProbe(final String tempProbeKey, final String method, final Object... params) {
public void publishToNoAuthProbe(final String tempProbeKey, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.PROBE);
message.addTarget(tempProbeKey);
this.publish(CHANNEL_NOAUTH_PROBE, message, method, params);
}
public void publishToProbe(final String probeKey, final String method, final Object... params) {
public void publishToProbe(final String probeKey, final String method, final Object... params) throws OverflowException {
PublishMessage message = new PublishMessage();
message.setTargetType(PublishMessage.TargetType.PROBE);
message.addTarget(probeKey);