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HttpClient-based client for Riak
/*
* This file is provided to you 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 com.basho.riak.client.builders;
import static com.basho.riak.client.util.CharsetUtils.utf8StringToBytes;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import com.basho.riak.client.DefaultRiakObject;
import com.basho.riak.client.IRiakObject;
import com.basho.riak.client.RiakLink;
import com.basho.riak.client.cap.BasicVClock;
import com.basho.riak.client.cap.VClock;
import com.basho.riak.client.query.indexes.RiakIndex;
import com.basho.riak.client.query.indexes.RiakIndexes;
import com.basho.riak.client.util.CharsetUtils;
/**
* Creates instances of {@link DefaultRiakObject}
* @author russell
*/
public class RiakObjectBuilder {
private final String bucket;
private final String key;
private byte[] value;
private VClock vclock;
private String vtag;
private Date lastModified;
private Collection links = new ArrayList();
private RiakIndexes indexes = new RiakIndexes();
private Map userMeta = new HashMap();
private String contentType;
private boolean isDeleted = false;
/**
* Create a new builder for a {@link IRiakObject} at bucket/key
*
* @param bucket
* @param key
*/
private RiakObjectBuilder(String bucket, String key) {
this.bucket = bucket;
this.key = key;
}
/**
* Static factory method
*
* @param bucket
* @param key
* @return a new {@link RiakObjectBuilder}
*/
public static RiakObjectBuilder newBuilder(String bucket, String key) {
return new RiakObjectBuilder(bucket, key);
}
/**
* Creates a builder prepopulated from the give {@link IRiakObject}.
*
* @param o
* the {@link IRiakObject} to copy
* @return a {@link RiakObjectBuilder} with all fields set from
* o
*/
public static RiakObjectBuilder from(IRiakObject o) {
RiakObjectBuilder rob = new RiakObjectBuilder(o.getBucket(), o.getKey());
rob.vclock = o.getVClock();
rob.contentType = o.getContentType();
rob.lastModified = o.getLastModified();
rob.value = o.getValue();
rob.links = o.getLinks();
rob.indexes = new RiakIndexes(o.allBinIndexes(), o.allIntIndexesV2());
rob.userMeta = o.getMeta();
rob.isDeleted = o.isDeleted();
return rob;
}
/**
* Construct a {@link DefaultRiakObject} from this builders parameters
* @return an {@link IRiakObject} with the values from this builder.
*/
public IRiakObject build() {
return new DefaultRiakObject(bucket, key, vclock, vtag, lastModified, contentType, value, links, userMeta,
indexes, isDeleted);
}
/**
* The value to give the constructed riak object
*
* @param value
* byte[] or null. NOTE: will be cloned.
* @return this
*/
public RiakObjectBuilder withValue(byte[] value) {
this.value = value==null? null : value.clone();
return this;
}
/**
* Convenience method assumes a UTF-8 encoded string
*
* @param value
* a UTF-8 encoded string
* @return this
*/
public RiakObjectBuilder withValue(String value) {
this.value = utf8StringToBytes(value);
this.contentType = CharsetUtils.addUtf8Charset(contentType);
return this;
}
/**
* The vector clock value for the constructed riak object
*
* @param vclock
* the byte[] of a vector clock: NOTE: will be cloned.
* @return this
* @throws IllegalArgumentException
* for a null vclock
*/
public RiakObjectBuilder withVClock(byte[] vclock) {
this.vclock = new BasicVClock(vclock);
return this;
}
/**
* The version tag for this riak object
*
* @param vtag
* @return this
*/
public RiakObjectBuilder withVtag(String vtag) {
this.vtag = vtag;
return this;
}
/**
* A long timestamp of milliseconds since the epoch to set as
* the last modified date on this Riak object
*
* @param lastModified
* @return
*/
public RiakObjectBuilder withLastModified(long lastModified) {
this.lastModified = new Date(lastModified);
return this;
}
/**
* A Collection of {@link RiakLink}s for the new riak object
*
* @param links
* the {@link Collection} of {@link RiakLink}s for the Riak
* object, is copied over the current collection, not merged!
* NOTE: this will be copied.
* @return this
*/
public RiakObjectBuilder withLinks(Collection links) {
if (links != null) {
this.links = new ArrayList(links);
}
return this;
}
/**
* Add a {@link RiakLink} to the new riak object's collection.
*
* @param bucket
* the bucket at the end of the link
* @param key
* the key at the end of the link
* @param tag
* the link tag
* @return this
*/
public RiakObjectBuilder addLink(String bucket, String key, String tag) {
synchronized (links) {
links.add(new RiakLink(bucket, key, tag));
}
return this;
}
/**
* A Collection of {@link RiakIndex}es for the new riak object
*
* @param indexes
* the {@link Collection} of {@link RiakIndex}es for the Riak
* object, is copied over the current collection, not merged!
* NOTE: this will be copied.
* @return this
*/
public RiakObjectBuilder withIndexes(RiakIndexes indexes) {
this.indexes = RiakIndexes.from(indexes);
return this;
}
/**
* Add a {@link RiakIndex} to the new riak object's collection.
*
* @param index
* the {@link RiakIndex} to add
* @return this
*/
public RiakObjectBuilder addIndex(String index, long value) {
this.indexes.add(index, value);
return this;
}
/**
* Add a {@link RiakIndex} to the new riak object's collection.
*
* @param index
* the {@link RiakIndex} to add
* @return this
*/
public RiakObjectBuilder addIndex(String index, String value) {
this.indexes.add(index, value);
return this;
}
/**
* A map of user meta data to set on the new riak object.
*
* @param usermeta
* a {@link Map}, copied over the current user meta (not merged):
* NOTE: is copied.
* @return this
*/
public RiakObjectBuilder withUsermeta(Map usermeta) {
if(usermeta != null) {
this.userMeta = new HashMap(usermeta);
}
return this;
}
/**
* Add an item of user meta data to the collection for the new Riak object.
*
* @param key
* @param value
* @return this
*/
public RiakObjectBuilder addUsermeta(String key, String value) {
synchronized (userMeta) {
userMeta.put(key, value);
}
return this;
}
/**
* The content-type of the data payload of the new Riak object.
*
* @param contentType
* @return this
*/
public RiakObjectBuilder withContentType(String contentType) {
this.contentType = contentType;
return this;
}
/**
* The new Riak objects vector clock.
* @param vclock
* @return this
*/
public RiakObjectBuilder withVClock(VClock vclock) {
this.vclock = vclock;
return this;
}
public RiakObjectBuilder withDeleted(boolean isDeleted) {
this.isDeleted = isDeleted;
return this;
}
}
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