/**
* Copyright 2016 Confluent Inc.
*
* 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 io.confluent.kafka.schemaregistry.maven;
import io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient;
import io.confluent.kafka.schemaregistry.client.SchemaRegistryClient;
import org.apache.avro.Schema;
import org.apache.avro.SchemaParseException;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugins.annotations.Parameter;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public abstract class SchemaRegistryMojo extends AbstractMojo {
@Parameter(required = true)
List<String> schemaRegistryUrls;
private SchemaRegistryClient client;
void client(SchemaRegistryClient client) {
this.client = client;
}
protected SchemaRegistryClient client() {
if (null == this.client) {
this.client = new CachedSchemaRegistryClient(this.schemaRegistryUrls, 1000);
}
return this.client;
}
protected Map<String, Schema> loadSchemas(Map<String, File> subjects) {
int errorCount = 0;
Map<String, Schema> results = new LinkedHashMap<>();
for (Map.Entry<String, File> kvp : subjects.entrySet()) {
Schema.Parser parser = new Schema.Parser();
getLog().debug(
String.format(
"Loading schema for subject(%s) from %s.",
kvp.getKey(),
kvp.getValue()
)
);
try (FileInputStream inputStream = new FileInputStream(kvp.getValue())) {
Schema schema = parser.parse(inputStream);
results.put(kvp.getKey(), schema);
} catch (IOException ex) {
getLog().error("Exception thrown while loading " + kvp.getValue(), ex);
errorCount++;
} catch (SchemaParseException ex) {
getLog().error("Exception thrown while parsing " + kvp.getValue(), ex);
errorCount++;
}
}
if (errorCount > 0) {
throw new IllegalStateException("One or more schemas could not be loaded.");
}
return results;
}
}