forked from public-mirrors/HuskSync
Implement compression via DataAdapter, add option to disable compression, better exception handling
William
3 years ago
parent
f2d4bec138
commit
1829526aa7
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package net.william278.husksync.data;
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import org.jetbrains.annotations.NotNull;
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import org.xerial.snappy.Snappy;
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import java.io.IOException;
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public class CompressedDataAdapter extends JsonDataAdapter {
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@Override
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public byte[] toBytes(@NotNull UserData data) throws DataAdaptionException {
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try {
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return Snappy.compress(super.toBytes(data));
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} catch (IOException e) {
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throw new DataAdaptionException("Failed to compress data", e);
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}
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}
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@Override
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public @NotNull UserData fromBytes(byte[] data) throws DataAdaptionException {
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try {
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return super.fromBytes(Snappy.uncompress(data));
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} catch (IOException e) {
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throw new DataAdaptionException("Failed to decompress data", e);
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}
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}
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}
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package net.william278.husksync.data;
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import org.jetbrains.annotations.NotNull;
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/**
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* An adapter that adapts {@link UserData} to and from a portable byte array.
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*/
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public interface DataAdapter {
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/**
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* Converts {@link UserData} to a byte array.
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*
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* @param data The {@link UserData} to adapt.
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* @return The byte array.
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* @throws DataAdaptionException If an error occurred during adaptation.
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*/
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byte[] toBytes(@NotNull UserData data) throws DataAdaptionException;
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/**
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* Converts a byte array to {@link UserData}.
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*
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* @param data The byte array to adapt.
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* @return The {@link UserData}.
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* @throws DataAdaptionException If an error occurred during adaptation, such as if the byte array is invalid.
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*/
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@NotNull
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UserData fromBytes(final byte[] data) throws DataAdaptionException;
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}
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package net.william278.husksync.data;
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/**
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* Indicates an error occurred during {@link UserData} adaptation to and from (compressed) json.
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*/
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public class DataAdaptionException extends RuntimeException {
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protected DataAdaptionException(String message, Throwable cause) {
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super(message, cause);
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}
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}
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package net.william278.husksync.data;
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/**
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* Indicates an error occurred during base-64 serialization and deserialization of data.
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* </p>
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* For example, an exception deserializing {@link InventoryData} item stack or {@link PotionEffectData} potion effect arrays
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*/
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public class DataDeserializationException extends RuntimeException {
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protected DataDeserializationException(String message, Throwable cause) {
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super(message, cause);
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}
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}
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@ -0,0 +1,24 @@
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package net.william278.husksync.data;
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import com.google.gson.GsonBuilder;
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import com.google.gson.JsonSyntaxException;
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import org.jetbrains.annotations.NotNull;
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import java.nio.charset.StandardCharsets;
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public class JsonDataAdapter implements DataAdapter {
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@Override
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public byte[] toBytes(@NotNull UserData data) throws DataAdaptionException {
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return new GsonBuilder().create().toJson(data).getBytes(StandardCharsets.UTF_8);
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}
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@Override
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public @NotNull UserData fromBytes(byte[] data) throws DataAdaptionException {
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try {
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return new GsonBuilder().create().fromJson(new String(data, StandardCharsets.UTF_8), UserData.class);
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} catch (JsonSyntaxException e) {
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throw new DataAdaptionException("Failed to parse JSON data", e);
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}
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}
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}
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