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Spring Cloud Stream aggregate counter-sink core
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/*
* Copyright 2013-2016 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.cloud.stream.app.aggregate.counter.sink;
import org.hibernate.validator.constraints.NotBlank;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.cloud.stream.app.time.DateFormat;
import org.springframework.expression.Expression;
import org.springframework.expression.common.LiteralExpression;
import org.springframework.integration.expression.ValueExpression;
import org.springframework.validation.annotation.Validated;
import javax.validation.constraints.AssertTrue;
import javax.validation.constraints.NotNull;
/**
* @author Ilayaperumal Gopinathan
*/
@ConfigurationProperties("aggregate-counter")
@Validated
public class AggregateCounterSinkProperties {
/**
* The default name of the aggregate counter
*/
@Value("${spring.application.name:aggregate-counter}")
private String defaultName;
/**
* The name of the aggregate counter.
*/
private String name;
/**
* A SpEL expression (against the incoming Message) to derive the name of the aggregate counter.
*/
private Expression nameExpression;
/**
* A SpEL expression (against the incoming Message) to derive the timestamp value.
*/
private Expression timeField;
/**
* Increment value for each bucket as a SpEL against the message
*/
private Expression incrementExpression = new ValueExpression<>(1L);
private String dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";
public String getName() {
if (name == null && nameExpression == null) {
return defaultName;
}
return name;
}
public void setName(String name) {
this.name = name;
}
public Expression getNameExpression() {
return nameExpression;
}
public Expression getComputedNameExpression() {
return (nameExpression != null ? nameExpression : new LiteralExpression(getName()));
}
public void setNameExpression(Expression nameExpression) {
this.nameExpression = nameExpression;
}
@AssertTrue(message = "exactly one of 'name' and 'nameExpression' must be set")
public boolean isExclusiveOptions() {
return getName() != null ^ getNameExpression() != null;
}
public Expression getTimeField() {
return timeField;
}
public void setTimeField(Expression timeField) {
this.timeField = timeField;
}
public Expression getIncrementExpression() {
return this.incrementExpression;
}
public void setIncrementExpression(Expression incrementExpression) {
this.incrementExpression = incrementExpression;
}
@NotBlank
@DateFormat
public String getDateFormat() {
return dateFormat;
}
@NotNull
public DateTimeFormatter getDateFormatter() {
return DateTimeFormat.forPattern(this.getDateFormat());
}
public void setDateFormat(String dateFormat) {
this.dateFormat = dateFormat;
}
}