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FileMetadataRegistryOnPostgres.java
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FileMetadataRegistryOnPostgres.java
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package jp.skypencil.brownie.registry;
import java.time.Instant;
import java.util.Iterator;
import java.util.Optional;
import java.util.UUID;
import org.springframework.util.MimeType;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.Vertx;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.asyncsql.AsyncSQLClient;
import io.vertx.ext.asyncsql.PostgreSQLClient;
import io.vertx.ext.sql.SQLConnection;
import jp.skypencil.brownie.FileMetadata;
public class FileMetadataRegistryOnPostgres implements FileMetadataRegistry, AutoCloseable {
private final AsyncSQLClient postgreSQLClient;
public FileMetadataRegistryOnPostgres(String host, Vertx vertx) {
JsonObject postgreSQLClientConfig = new JsonObject()
.put("host", host)
.put("username", "brownie")
.put("password", "brownie")
.put("database", "brownie");
this.postgreSQLClient = PostgreSQLClient.createShared(vertx, postgreSQLClientConfig);
}
@Override
public void iterate(Handler<AsyncResult<FileMetadataReadStream>> handler) {
java.util.Objects.requireNonNull(handler);
Future<FileMetadataReadStream> future = Future.future();
postgreSQLClient.getConnection(ar -> {
if (ar.failed()) {
future.fail(ar.cause());
handler.handle(future);
return;
}
SQLConnection con = ar.result();
con.query("SELECT id, name, mime_type, content_length, generated FROM file_metadata",
res -> {
try (SQLConnection connection = con) {
if (res.failed()) {
future.fail(res.cause());
} else {
Iterator<FileMetadata> iterator = res.result().getResults()
.stream()
.map(json -> {
UUID fileId = UUID.fromString(json.getString(0));
MimeType mimeType = MimeType.valueOf(json.getString(2));
Instant generated = Instant.parse(json.getString(4) + "Z");
return new FileMetadata(fileId, json.getString(1), mimeType, json.getLong(3), generated);
})
.iterator();
future.complete(new FileMetadataReadStreamImpl(iterator));
}
}
handler.handle(future);
});
});
}
@Override
public void store(FileMetadata metadata,
Handler<AsyncResult<Void>> handler) {
Future<Void> future = Future.future();
postgreSQLClient.getConnection(ar -> {
if (ar.failed()) {
future.fail(ar.cause());
if (handler != null) {
handler.handle(future);
}
return;
}
JsonArray params = new JsonArray()
.add(metadata.getFileId().toString())
.add(metadata.getName())
.add(metadata.getMimeType().toString())
.add(metadata.getContentLength())
.add(metadata.getGenerated());
SQLConnection con = ar.result();
con.updateWithParams("INSERT INTO file_metadata (id, name, mime_type, content_length, generated) VALUES (?, ?, ?, ?, ?)",
params,
res -> {
try (SQLConnection connection = con) {
if (res.failed()) {
future.fail(res.cause());
} else {
future.complete();
}
}
if (handler != null) {
handler.handle(future);
}
});
});
}
@Override
public void update(FileMetadata metadata,
Handler<AsyncResult<Void>> handler) {
Future<Void> future = Future.future();
postgreSQLClient.getConnection(ar -> {
if (ar.failed()) {
future.fail(ar.cause());
if (handler != null) {
handler.handle(future);
}
return;
}
JsonArray param = new JsonArray()
.add(metadata.getName())
.add(metadata.getMimeType().toString())
.add(metadata.getContentLength())
.add(metadata.getGenerated())
.add(metadata.getFileId().toString());
SQLConnection con = ar.result();
con.queryWithParams("UPDATE file_metadata SET name = ?, mime_type = ?, content_length = ?, generated = ? WHERE id = ?",
param, res -> {
try (SQLConnection connection = con) {
if (res.failed()) {
future.fail(res.cause());
} else if (res.result().getNumRows() == 0){
future.fail("No record found");
} else {
future.complete();
}
}
if (handler != null) {
handler.handle(future);
}
});
});
}
@Override
public void load(UUID fileId,
Handler<AsyncResult<Optional<FileMetadata>>> handler) {
Future<Optional<FileMetadata>> future = Future.future();
postgreSQLClient.getConnection(ar -> {
if (ar.failed()) {
future.fail(ar.cause());
if (handler != null) {
handler.handle(future);
}
return;
}
JsonArray param = new JsonArray().add(fileId.toString());
SQLConnection con = ar.result();
con.queryWithParams("SELECT name, mime_type, content_length, generated FROM file_metadata WHERE id = ?",
param, res -> {
try (SQLConnection connection = con) {
if (res.failed()) {
future.fail(res.cause());
} else {
Optional<FileMetadata> optional = res.result().getRows().stream().findFirst().map(jsonObject -> {
Instant generated = Instant.parse(jsonObject.getString("generated") + "Z");
return new FileMetadata(fileId,
jsonObject.getString("name"),
MimeType.valueOf(jsonObject.getString("mime_type")),
jsonObject.getLong("content_length"),
generated);
});
future.complete(optional);
}
}
if (handler != null) {
handler.handle(future);
}
});
});
}
@Override
public void delete(UUID fileId, Handler<AsyncResult<Void>> handler) {
Future<Void> future = Future.future();
this.postgreSQLClient.getConnection(ar -> {
if (ar.failed()) {
future.fail(ar.cause());
if (handler != null) {
handler.handle(future);
}
return;
}
JsonArray param = new JsonArray().add(fileId.toString());
SQLConnection con = ar.result();
con.setAutoCommit(false, result -> {
if (result.failed()) {
future.fail(result.cause());
return;
}
con.queryWithParams("SELECT * FROM file_metadata WHERE id = ? FOR UPDATE",
param, selected -> {
if (selected.failed()) {
future.fail(selected.cause());
con.rollback(rolled -> {
try (SQLConnection connection = con) {
if (handler != null) {
handler.handle(future);
}
}
});
return;
}
Integer count = selected.result().getResults().size();
if (count == 0) {
future.fail("No record found");
con.rollback(rolled -> {
try (SQLConnection connection = con) {
if (handler != null) {
handler.handle(future);
}
}
});
return;
}
con.queryWithParams("DELETE FROM file_metadata WHERE id = ?",
param, res -> {
if (res.failed()) {
future.fail(res.cause());
con.rollback(rolled -> {
try (SQLConnection connection = con) {
if (handler != null) {
handler.handle(future);
}
}
});
} else {
future.complete();
con.commit(commit -> {
try (SQLConnection connection = con) {
if (handler != null) {
handler.handle(future);
}
}
});
}
});
});
});
});
}
@Override
public void close() {
this.postgreSQLClient.close();
}
}