使用Axon框架来压缩和解压缩JSON数据可以通过以下步骤实现:
org.axonframework
axon-core
4.5.1
org.apache.commons
commons-compress
1.21
MessageConverter
接口并使用GZIP库来进行数据压缩和解压缩。以下是一个示例实现:import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;
import org.axonframework.serialization.ContentTypeConverter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
public class GzipJsonMessageConverter implements ContentTypeConverter {
@Override
public Class expectedSourceType() {
return byte[].class;
}
@Override
public Class targetType() {
return byte[].class;
}
@Override
public byte[] convert(byte[] original) {
try (ByteArrayInputStream inputStream = new ByteArrayInputStream(original);
GzipCompressorInputStream gzipInputStream = new GzipCompressorInputStream(inputStream);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
byte[] buffer = new byte[1024];
int length;
while ((length = gzipInputStream.read(buffer, 0, buffer.length)) != -1) {
outputStream.write(buffer, 0, length);
}
return outputStream.toByteArray();
} catch (IOException e) {
throw new IllegalStateException("Failed to decompress JSON data", e);
}
}
@Override
public byte[] revert(byte[] compressed) {
try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
GzipCompressorOutputStream gzipOutputStream = new GzipCompressorOutputStream(outputStream)) {
gzipOutputStream.write(compressed);
gzipOutputStream.finish();
return outputStream.toByteArray();
} catch (IOException e) {
throw new IllegalStateException("Failed to compress JSON data", e);
}
}
}
@Configuration
注解标记的类)中,添加以下配置:import org.axonframework.serialization.ContentTypeConverter;
import org.axonframework.serialization.Serializer;
import org.axonframework.serialization.json.JacksonSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class AxonConfig {
@Bean
public Serializer serializer() {
JacksonSerializer jacksonSerializer = JacksonSerializer.defaultSerializer();
jacksonSerializer.registerConverter(gzipJsonMessageConverter());
return jacksonSerializer;
}
@Bean
public ContentTypeConverter gzipJsonMessageConverter() {
return new GzipJsonMessageConverter();
}
}
现在,当Axon框架序列化和反序列化JSON数据时,它将自动使用GZIP进行压缩和解压缩。你可以像往常一样使用Axon框架的命令、事件和查询等功能,而不需要额外的代码来处理压缩和解压缩。
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