org.springframework.data.gemfire.function.PojoFunctionWrapper Maven / Gradle / Ivy
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.springframework.data.gemfire.function;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.ObjectUtils;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.StringUtils;
import com.gemstone.gemfire.cache.execute.Function;
import com.gemstone.gemfire.cache.execute.FunctionContext;
import com.gemstone.gemfire.cache.execute.ResultSender;
/**
* Invokes a POJO's given method as a Gemfire remote function.
* If the POJO has a constructor that takes a Map, and the function context is Region, the
* region will be injected. The delegate class name, the method name, and the method arguments
* are part of a remote function invocation, therefore all arguments must be serializable
* or an alternate serialization method must be used.
* The delegate class must be the class path of the remote cache(s)
* @author David Turanski
*
*/
@SuppressWarnings("serial")
public class PojoFunctionWrapper implements Function {
private static transient Log logger = LogFactory.getLog(PojoFunctionWrapper.class);
private volatile boolean HA;
private volatile boolean hasResult;
private volatile boolean optimizeForWrite;
private volatile int batchSize;
private final FunctionArgumentResolver functionArgumentResolver;
private final Method method;
private final Object target;
private final String id;
public PojoFunctionWrapper(Object target, Method method, String id) {
this.functionArgumentResolver = new FunctionContextInjectingArgumentResolver(method);
this.target = target;
this.method = method;
this.id = (StringUtils.hasText(id) ? id : method.getName());
this.HA = false;
this.hasResult = !(method.getReturnType().equals(void.class));
this.optimizeForWrite = false;
}
public void setBatchSize(int batchSize) {
this.batchSize = batchSize;
}
public void setHA(boolean HA) {
this.HA = HA;
}
@Override
public boolean isHA() {
return this.HA;
}
public void setHasResult(boolean hasResult) {
this.hasResult = hasResult;
}
@Override
public boolean hasResult() {
return this.hasResult;
}
@Override
public String getId() {
return this.id;
}
public void setOptimizeForWrite(boolean optimizeForWrite) {
this.optimizeForWrite = optimizeForWrite;
}
@Override
public boolean optimizeForWrite() {
return this.optimizeForWrite;
}
@Override
public void execute(final FunctionContext functionContext) {
Object[] args = this.functionArgumentResolver.resolveFunctionArguments(functionContext);
Object result = invokeTargetMethod(args);
if (hasResult()) {
sendResults(functionContext.getResultSender(), result);
}
}
protected final Object invokeTargetMethod(Object[] args) {
if (logger.isDebugEnabled()) {
logger.debug(String.format("about to invoke method %s on class %s as function %s", method.getName(),
target.getClass().getName(), this.id));
for (Object arg : args) {
logger.debug("arg:" + arg.getClass().getName() + " " + arg.toString());
}
}
return ReflectionUtils.invokeMethod(method, target, (Object[]) args);
}
private void sendResults(ResultSender