/*
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* Copyright 2015 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.models;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import java.util.NoSuchElementException;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import com.gitblit.Constants;
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/**
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* A FilestoreModel represents a file stored outside a repository but referenced by the repository using a unique objectID
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*
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* @author Paul Martin
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*
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*/
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public class FilestoreModel implements Serializable, Comparable<FilestoreModel> {
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private static final long serialVersionUID = 1L;
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private static final String metaRegexText = new StringBuilder()
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.append("version\\shttps://git-lfs.github.com/spec/v1\\s+")
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.append("oid\\ssha256:(" + Constants.REGEX_SHA256 + ")\\s+")
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.append("size\\s([0-9]+)")
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.toString();
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private static final Pattern metaRegex = Pattern.compile(metaRegexText);
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private static final int metaRegexIndexSHA = 1;
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private static final int metaRegexIndexSize = 2;
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public final String oid;
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private Long size;
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private Status status;
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//Audit
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private String stateChangedBy;
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private Date stateChangedOn;
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//Access Control
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private List<String> repositories;
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public FilestoreModel(String id, long definedSize) {
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oid = id;
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size = definedSize;
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status = Status.ReferenceOnly;
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}
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public FilestoreModel(String id, long expectedSize, UserModel user, String repo) {
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oid = id;
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size = expectedSize;
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status = Status.Upload_Pending;
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stateChangedBy = user.getName();
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stateChangedOn = new Date();
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repositories = new ArrayList<String>();
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repositories.add(repo);
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}
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/*
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* Attempts to create a FilestoreModel from the given meta string
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*
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* @return A valid FilestoreModel if successful, otherwise null
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*/
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public static FilestoreModel fromMetaString(String meta) {
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Matcher m = metaRegex.matcher(meta);
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if (m.find()) {
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try
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{
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final Long size = Long.parseLong(m.group(metaRegexIndexSize));
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final String sha = m.group(metaRegexIndexSHA);
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return new FilestoreModel(sha, size);
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} catch (Exception e) {
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//Fail silent - it is not a valid filestore item
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}
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}
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return null;
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}
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public synchronized long getSize() {
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return size;
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}
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public synchronized Status getStatus() {
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return status;
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}
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public synchronized String getChangedBy() {
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return stateChangedBy;
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}
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public synchronized Date getChangedOn() {
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return stateChangedOn;
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}
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public synchronized void setStatus(Status status, UserModel user) {
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this.status = status;
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stateChangedBy = user.getName();
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stateChangedOn = new Date();
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}
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public synchronized void reset(UserModel user, long size) {
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status = Status.Upload_Pending;
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stateChangedBy = user.getName();
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stateChangedOn = new Date();
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this.size = size;
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}
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/*
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* Handles possible race condition with concurrent connections
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* @return true if action can proceed, false otherwise
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*/
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public synchronized boolean actionUpload(UserModel user) {
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if (status == Status.Upload_Pending) {
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status = Status.Upload_In_Progress;
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stateChangedBy = user.getName();
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stateChangedOn = new Date();
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return true;
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}
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return false;
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}
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public synchronized boolean isInErrorState() {
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return (this.status.value < 0);
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}
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public synchronized void addRepository(String repo) {
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if (status != Status.ReferenceOnly) {
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if (!repositories.contains(repo)) {
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repositories.add(repo);
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}
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}
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}
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public synchronized void removeRepository(String repo) {
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if (status != Status.ReferenceOnly) {
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repositories.remove(repo);
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}
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}
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public synchronized boolean isInRepositoryList(List<String> repoList) {
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if (status != Status.ReferenceOnly) {
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for (String name : repositories) {
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if (repoList.contains(name)) {
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return true;
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}
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}
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}
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return false;
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}
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public static enum Status {
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ReferenceOnly(-42),
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Deleted(-30),
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AuthenticationRequired(-20),
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Error_Unknown(-8),
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Error_Unexpected_Stream_End(-7),
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Error_Invalid_Oid(-6),
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Error_Invalid_Size(-5),
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Error_Hash_Mismatch(-4),
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Error_Size_Mismatch(-3),
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Error_Exceeds_Size_Limit(-2),
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Error_Unauthorized(-1),
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//Negative values provide additional information and may be treated as 0 when not required
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Unavailable(0),
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Upload_Pending(1),
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Upload_In_Progress(2),
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Available(3);
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final int value;
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Status(int value) {
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this.value = value;
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}
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public int getValue() {
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return value;
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}
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@Override
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public String toString() {
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return name().toLowerCase().replace('_', ' ');
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}
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public static Status fromState(int state) {
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for (Status s : values()) {
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if (s.getValue() == state) {
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return s;
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}
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}
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throw new NoSuchElementException(String.valueOf(state));
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}
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}
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@Override
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public int compareTo(FilestoreModel o) {
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return this.oid.compareTo(o.oid);
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}
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}
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